Abstract
Objectives
The study aims to evaluate whether the ultrasonographic assessment of diaphragm and lung function in postanaesthesia care unit (PACU) can improve postoperative respiratory function recovery in patients under general anesthesia recovery.
Methods
This study enrolled 130 participants scheduled for elective abdominal surgery with planned postoperative transfer to PACU. Participants were randomized to either the diaphragm-lung ultrasound-guided group (group DL) or standard resuscitation group without ultrasound guidance (group N). The group DL received diaphragm and lung ultrasonography at four predefined intervals and intervention based on the ultrasound results was performed. The primary outcomes were the incidence of hypoxemia (PaO2/FiO2≤300 mmHg) at discharge of PACU and the extubation time. The postoperative pulmonary complications (PPCs) within the first 7 days was measured as a key secondary outcome.
Results
Compared with the group N, the incidence of hypoxemia (p<0.01) and the extubation time (p<0.01) were significantly reduced in the group DL. There was no significant difference in the incidence of PPCs between the two groups (p>0.1).
Conclusions
Dynamic assessment of pulmonary and diaphragm function by ultrasound improved the recovery of respiratory function in patients but did not reduce the incidence of PPCs.
Introduction
General anesthesia rapidly reduces functional residual capacity by approximately 20 % and impairs respiratory muscle function, particularly diaphragmatic activity [1]. The incidence of postoperative pulmonary complications (PPCs) in major surgery ranges from 1 to 23 % [2]. Abdominal surgery further compromises respiratory function through tissue trauma, phrenic nerve inhibition, and pneumoperitoneum effects [3]. Weingarten et al. [4] demonstrated that even a single episode of respiratory depression in postanaesthesia care unit (PACU) was strongly associated with subsequent respiratory complications. Inadequate recovery of respiratory physiology can lead to severe hypoxemia-induced end-organ damage and even death [4], 5]. Thus, effective respiratory monitoring and accelerated functional recovery during anesthesia emergence are critical. In recent years, with the continuous popularization and promotion of bedside ultrasound technology, bedside ultrasound has been proved to be of great value in evaluating patients’ real-time status [6], [7], [8].
Lung ultrasound (LUS) has been validated for the diagnosis of atelectasis, pneumonia, pleural effusion and pneumothorax [8], [9], [10], [11], [12]. Chen et al. [8] showed high accuracy of LUS in diagnosing different aetiologies of postoperative hypoxia in the PACU with a high degree of sensitivity and specificity. Both diaphragmatic excursion and diaphragm thickening fraction (DTF) showed good diagnostic performance in predicting extubation outcomes [13]. Previous publications on LUS and diaphragm ultrasound were mostly from emergency departments and ICUs. There are still few related studies on the application of the combination of the two in postoperative anesthesia recovery period.
Therefore, this study evaluates whether combined diaphragm-lung ultrasound assessment guiding targeted interventions in PACU enhances respiratory recovery after general anesthesia.
Methods
Trial design
This prospective, patient-blinded, single-center randomized controlled trial was approved by the Ethics Committee of Jiangxi Provincial People’s Hospital (2022-037, 2022/8/15) and was registered at the Chinese Clinical Trial Registry (trial number: ChiCTR2200064548; Date of registration: 11/10/2022). We enrolled 135 patients, aged 18–85 years, ASA I-III, who underwent elective abdominal surgery in our hospital from October 2022 to February 2023 and were transferred to the PACU with the endotracheal tube postoperatively. Exclusion criteria included preexisting respiratory conditions (diaphragmatic dysfunction, pleural effusion, pneumothorax, mediastinal emphysema, interstitial lung disease, moderate to severe chronic obstructive pulmonary disease), cardiac impairment (NYHA classe ≥III), neuromuscular disorders and thoracic surgery history. Withdrawal criteria included failure to transfer to PACU as planned or postoperative pain/sedation issues (VAS >3 or Ramsay score >2 after extubation).
Patients were randomized to diaphragm-lung ultrasound-guided group (group DL) or standard resuscitation group without ultrasound guidance (group N) using a computer-generated sequence of random numbers. Allocation details were sealed in numbered envelopes. The group DL underwent pulmonary and diaphragmatic ultrasound assessments at four timepoints: admission in operating room (T0), admission in PACU (T1), 15 min after extubation (T2), and discharge of PACU (T3). The enrollment and allocation of participants are compiled in Figure 1.

Consort flow diagram.
Anesthesia method
Standardized monitoring included three-lead electrocardiography, SpO2, blood pressure, and BIS was performed after patients entered the room. After a FiO2 60 % pre-oxygenation, general anesthesia was induced with standard doses of propofol, vecuronium bromide and sufentanil. Tracheal intubation was performed, followed by an anesthesia machine (Drager, Germany) for mechanical ventilation, using volume-controlled ventilation, tidal volume of 8 mL/kg, respiratory rate of 12–18 times/min, FiO2 40 %, positive end-expiratory pressure (PEEP) of 5–8 cmH2O and end-tidal CO2 (Philips IntelliVue MP, Philips Medizin Systeme, Germany) controlled between 35 and 45 mmHg. Maintenance of anesthesia used 1.0 MAC sevoflurane, remifentanil 0.1–0.5 ug⋅kg−1⋅h−1, propofol 4–6 mg⋅kg−1⋅h−1, intermittently gave vecuronium bromide 0.03 mg/kg, adjusting the dosage of drugs according to the depth of anesthesia, and the BIS was maintained at 40–60. During the operation, the fluctuation range of a mean arterial pressure (MAP) should not exceed 20 % of the base value. Vecuronium bromide was stopped about 40 min before the end of the operation. Sevoflurane was stopped about 10 min before the end of the operation. Remifentanil was stopped after the operation. In both group, recruitment maneuver was carried out by manual infation with 30 cmH2O airway pressure with FiO2 of 0.4 for 30s at the end of the operation [14].
All the patients were admitted to the PACU with tracheal intubation, and were placed at a head height of 30°. Patients in PACU were given neostigmine 0.02 mg/kg and atropine 10 μg/kg after spontaneous breathing occurs. Extubation was determined by the anesthesiologist in PACU when patients met the following criteria: responsive to verbal commands, return of spontaneous breathing with a tidal volume ≥5 mL/kg, respiratory rate of 10–20 breaths/min, end-tidal CO2 <45 mmHg with a regular waveform, and SpO2 >95 %. After extubation, the VAS score and Ramsay sedation score were assessed, and oxygen was inhaled through a nasal oxygen tube at an oxygen flow rate of 5 L/min. When the patient’s Steward score is ≥6 points, the patient can be sent out of the PACU and transferred to the ward. At T3 (PACU discharge), arterial blood samples were obtained from all patients. The PaO2/FiO2 ratio was calculated from these analyses, with values ≤300 mmHg defining hypoxemia [15].
LUS assessment and intervention
The patient was examined for LUS by 12-zone approach. Each half of the chest is divided into front, outside, and rear areas by the anterior axillary line and the posterior axillary line, and divided into upper and lower areas through the nipple level. There are 6 areas in total and 12 areas in bilateral lungs [16]. A fixed lung sonographer scans and scores each area (0–3 points), and adopts the modified scoring standard of Monastesse et al. [17]: a (0 point): normal aeration-lung sliding sign with A lines or ≤2 separate B-lines; b (1 point): Mild aeration defect – multiple distinct B lines (fused B lines less than 50 % of intercostal space on vertical scan), one or more small pleura inferior consolidation is separated by normal pleural line; c (2 points): Moderate lung aeration defect-multiple merged B-lines (fused B lines are more than 50 % of the intercostal space on vertical scan), multiple small subpleural consolidations are separated by thickened or irregular pleural lines; d (3 points): white lung or lung consolidation-atelectasis: air bronchus sign, debris sign, tissue-like sign. The LUS scores of the 12 zones were pooled and analyzed to calculate LUS score (0–36 points).
The higher the score, the more severe the ventilation loss, except for pneumothorax. At T1 (PACU admission) – T2 (15 min post-extubation), lung ultrasound showed more than 15 B-lines in the anterior chest region, suggesting that extravascular lung water increased and furosemide 20 mg was given [12]. At T1, LUS score >2 points in a single area or >10 points in total, ultrasound-guided lung recruitment was performed.
Lung Recruitment Method: The ultrasound probe was placed in the most severe area of atelectasis, maintaining the airway pressure at 15 cmH2O, increasing PEEP by 5 cmH2O each time and maintaining it for 5 s after each increase, with a maximum of 40 cmH2O with FiO2 of 0.4 until the lung consolidation disappears under ultrasound. Besides, the pressure at that time was maintained for 30 s, and then decreased to maintain the previous ventilator setting [14], 18]. If MAP or heart rate changes >15 %, stop the recruitment maneuver.
Diaphragm ultrasound assessment and intervention
The patient was placed in a supine position with a head height of 30°, and a 10–15 MHz high-frequency linear array probe was placed perpendicular to the long axis of the ribs in the 8–10 intercostal space between the anterior axillary line and the midaxillary line, and 0.5–2 cm above the costophrenic sinus. Diaphragm thickness was assessed by the same sonographer. In B mode, find the diaphragm. In M mode, measure the end-inspiration and end-expiration diaphragm thickness, and calculate the DTF=(end-inspiration thickness – end-expiration thickness)/end-expiration thickness × 100 %, DTF is the average of 3 breaths. To ensure the reproducibility of the ultrasound examination, the position of the probe was carefully marked and the ultrasound examination of the diaphragm was performed at the same location in the PACU. Diaphragm ultrasonic images of one representative patient at different time points are displayed in Figure 2. DTF less than 30 % is a measure of ultrasonographic diaphragmatic dysfunction [19]. When the ultrasound evaluation of the diaphragm at T2 (15 min post-extubation) indicates diaphragmatic dysfunction, the patient will be given additional neostigmine 30 μg/kg plus atropine 10 μg/kg, and the maximum dose of neostigmine is 5 mg/d [20].

The left figure shows the end-inspiratory and end-expiration diaphragm thickening at T0 with the DTF reaching 50 %. The right figure shows the end-inspiratory and end-expiration diaphragm thickening of the same patient at T2, and the DTF is 23.5 %, suggesting that the patient’s diaphragm function is incompetent at this time point.
Outcomes
The primary outcomes were the incidence of hypoxemia (PaO2/FiO2≤300 mmHg) at T3 (PACU discharge) and the extubation time(time from admission to PACU to extubation). The PPCs within the first 7 postoperative days was measured as a key secondary outcome. The PPCs were defined according to the ARISCAT study (the criteria of respiratory infection, respiratory failure, bronchospasm, atelectasis, pleural effusion, pneumothorax, and aspiration pneumonitis.) [2], 21], 22]. Complications that do not need to be treated or have no clinical significance, such as a small amount of pneumothorax or pleural effusion, localized subcutaneous emphysema and so forth will not be recorded if they do not adversely affect the patient’s postoperative recovery and discharge.
The other secondary outcomes were defined as follows:(1) the DTF and LUS score at four time points, (2) the PACU length-of-stay and the interventions during PACU length-of-stay, (3) the SpO2 at four time points and the lowest SpO2 in each group after extubation, Details of the protocol are provided in Figure 3.

Schematic diagram of the study protocol.
Statistical analysis
According to the results of the pre-test, the incidence of hypoxemia in the two groups after extubation was taken as the main result (the incidence of hypoxemia in the two groups was 0.35 and 0.10 respectively). Setting α=0.05, 1-β=0.9, and loss-to-follow-up rate of 10 %, the sample size of at least 60 cases in each group was calculated by PASS 15 software (NCSS, Canada).The measurement data conforming to the normal distribution were expressed as mean±standard deviation (x±s), and the independent sample t-test was used for comparison between groups. The measurement data that were not normally distributed were expressed as the median (interquartile range) [M(IQR)], and the non-parametric Mann-Whitney U test was used for comparison between groups. The enumeration data was expressed as the number of cases (percentage), and the chi-square test or continuous corrected chi-square test was used for comparison between groups. One-way repeated measures analysis of variance (ANOVA) was used to analyze changes in SpO2, lung ventilation and diaphragm thickness at different time points. For all analyses, a two-sided p<0.05 was considered statistically significant. SPSS 26.0 statistical software (IBM, USA) was used when analyzing the data.
Results
Patient enrollment and characteristics
A total of 135 patients undergoing elective abdominal surgery at Jiangxi Provincial People’s Hospital (October 2022–February 2023) were assessed for eligibility. Five patients were excluded because they met any of the withdrawal criteria and 130 patients were finally enrolled. There were 65 cases in each group, including 61 males and 69 females. There was no significant difference between the two groups in gender, age, BMI, ASA class, smoking rate, operation time, operation type, operation method, intraoperative fluid intake and output, and muscle relaxant usage (Table 1). There were no reintubation events in both groups.
Patient characteristics (N=130).
| Category | Group DL | Group N | p-Value |
|---|---|---|---|
| Age, years | 56.45 ± 14.13 |
59.35 ± 13.10 | 0.226 |
| Male gender | 32 (49.2 %) | 29 (44.6 %) | 0.598 |
| BMI, kg/m2 | 23.07 ± 3.46 | 22.33 ± 3.04 | 0.197 |
| ASA Class/Case, % | 0.103 | ||
| II | 36 (55.4 %) | 45 (69.2 %) | |
| III | 29 (44.6 %) | 20 (30.8 %) | |
| Perioperative smoking | 8 (12.3 %) | 14 (21.15 %) | 0.16 |
| SpO2–T0,% | 98.51 ± 1.59 | 98.35 ± 1.54 | 0.451 |
| Operation time, min | 199.11 ± 87.67 | 214.72 ± 96.02 | 0.335 |
| Inpatient days, d | 10.00 (6.50, 14.00) | 9.00 (6.00, 13.00) | 0.823 |
| Operation type | 0.625 | ||
| Gastrectomy and pancreatectomy | 15 (23.1 %) | 17 (26.2 %) | |
| Hepatectomy | 8 (12.3 %) | 12 (18.5 %) | |
| Enterectomy | 18 (27.7 %) | 13 (20.0 %) | |
| Others | 24 (36.9 %) | 23 (35.4 %) | |
| Laparoscopy | 57 (87.7 %) | 59 (90.8 %) | 0.571 |
| Intraoperative fluid Intake, mL | 1600.00 (1200.0, 2000.0) | 1500.00 (1235.0, 2200.0) | 0.450 |
| Intraoperative fluid Output, mL | 450.00 (275.00, 775.00) | 450.00 (380.00) | 0.307 |
| Muscle relaxant usage, mg | 14.00 (12.00, 17.00) | 16.00 (12.00, 20.00) | 0.095 |
Perioperative ultrasound findings
Compared with T0 (operating room admission), the end-inspiratory diaphragm thickening of patients in the group DL was significantly reduced at T1 (PACU admission) and T2 (15 min post-extubation) (p<0.01). The thickness of the diaphragm at the end of inspiration was minimum at T1, which was statistically different from other time points (p<0.01). There was still a statistically significant difference in end-inspiratory diaphragm thickening between T3 (PACU discharge) and T0 (p<0.01). Compared with T0, the DTF of patients at T1, T2, and T3 decreased significantly (p<0.01). The DTF of patients at T1 was the lowest, and began to increase at T1–T3, but T3 was still lower than T0 (p<0.01). Compared with T0, the LUS score of patients at T1, T2, and T3 was significantly increased (p<0.01) (Table 2).
LUS Score, Diaphragm thickening and DTF at different time points.
| T0 | T1 | T2 | T3 | |
|---|---|---|---|---|
| LUS Score | 0.23 ± 0.52 | 5.22 ± 2.89a | 4.31 ± 2.05a | 3.89 ± 1.96a |
| End-inspiration, mm | 0.29 ± 0.07 | 0.24 ± 0.07a | 0.27 ± 0.06a | 0.29 ± 0.07 |
| End-exspiration, mm | 0.20 ± 0.04 | 0.19 ± 0.05 | 0.19 ± 0.04 | 0.20 ± 0.04 |
| DTF, % | 49.06 ± 14.75 | 28.51 ± 12.62a | 38.87 ± 9.36a | 43.83 ± 8.26a |
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Compared with T0, ap<0.05.
Primary outcomes
Post-extubation hypoxemia occurred in 20 patients in the group N vs. 5 patients in the group DL. The incidence of hypoxemia in the group DL was significantly lower than group N (7.7 VS 30.8 %, p<0.01). Time to extubation was significantly shorter in the group DL compared with the group N (p<0.01). The detailed results were presented in Table 3.
Comparison of extubation time, incidence rate of hypoxemia at T3 and pulmonary complications and PACU length-of-stay(two groups).
| Group DL | Group N | p-Value | |
|---|---|---|---|
| Extubation time | 24.00 (12.50, 45.00)a | 35.00 (20.50, 50.50) | 0.009 |
| Incidence rate of hypoxemia after extubation | 7.7 %a | 30.8 % | 0.001 |
| Incidence rate of pulmonary complications | 3.1 % | 6.2 % | 0.680 |
| PACU length-of-stay | 62.00 (50.50, 83.00)a | 83.00 (67.50, 100.50) | 0.000 |
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Compared with the Group N, ap<0.05.
Secondary outcomes
There was no significant difference in the incidence of postoperative pulmonary complications between the two groups (3.1 VS. 6.2 %, p>0.1), including 2 cases in the group DL (1 case of pulmonary infection, 1 case of pulmonary infection combined with pleural effusion) and 4 cases in Group N (2 cases of pulmonary infection, 2 cases of pulmonary infection combined with pleural effusion). PACU length of stay was significantly shorter in the group DL vs. group N (p<0.01). The detailed results were summarized in Table 3.
There was no significant difference in SpO2 and the lowest SpO2 after extubation between the two groups at different time points (Table 4).
Comparison of SpO2 and lowest SpO2 at each time point (two groups).
| SpO2–T0 | SpO2–T1 | SpO2–T2 | SpO2–T3 | Lowest SpO2 | |
|---|---|---|---|---|---|
| Group DL | 98.51 ± 1.59 | 99.66 ± 0.67 | 99.06 ± 1.39 | 99.43 ± 0.88 | 98.17 ± 1.69 |
| Group N | 98.35 ± 1.54 | 99.75 ± 0.56 | 98.86 ± 1.57 | 99.38 ± 1.07 | 97.43 ± 2.90 |
| P | 0.451 | 0.471 | 0.330 | 0.906 | 0.078 |
In the group N, furosemide was used in 2 patients at T1, and 3 patients needed to use masks or oropharyngeal airway after extubation at T2. In the group DL, 5 patients received furosemide at T1, 9 patients underwent ultrasound-guided lung recruitment maneuvers, and 8 patients received neostigmine and atropine at T2. Total interventions were significantly higher in the group DL vs. group N (p<0.05). Compared with the group N, the number of intervention cases required at T1 in the group DL was significantly increased (p<0.05), referring to Table 5 for detailed data.
The number of cases requiring intervention at different time points after extubation (two groups).
| Total number of cases | T0 | T1 | T2 | T3 | |
|---|---|---|---|---|---|
| Group N | 5 | 0 | 2 | 3 | 0 |
| Group DL | 22a | 0 | 14a | 8 | 0 |
| P | 0.000 | 0.003 | 0.207 |
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Compared with the group N, ap<0.05.
Discussion
Respiratory insufficiency is common in patients recovering from anesthesia with delayed recognition risking hypoxic organ damage and mortality [23]. This underscores the critical need for enhanced respiratory monitoring during anesthesia recovery. Our study demonstrates that combined diaphragm-lung ultrasound assessment significantly reduced extubation time and post-extubation hypoxemia compared to conventional resuscitation.
Auscultation as one of the essential components of the clinical examination might be challenging as dorsal lung fields are difficult to reach in supine positioned patients, and the environment in PACU is often noisy. Cox’s [9] study suggested that the agreement between lung ultrasound and auscultation is poor where 33 % of patients showed ultrasound evidence of pulmonary edema, yet 51 % of these had normal auscultation findings. Meanwhile the diagnostic accuracy of auscultation was better in non-ventilated than in ventilated patients. In our study, more patients with increased extravascular lung water were screened in the ultrasound group than those who relied on auscultation and SpO2 solely, and diuretics were used before the patients developed obvious symptoms of pulmonary edema which is related to that ultrasound is highly sensitive, specific, and reproducible for diagnosing the increase of extravascular lung water and pulmonary edema in patients at the bedside [12], 24]. Studies by other scholars also showed that Ultrasound-guided alveolar recruitment, regardless of the technique, could be more effective because it facilitates real-time monitoring of the expansion of collapsed alveoli [17], 25]. An ultrasound-guided recruitment manoeuvre was performed in the ultrasound group which can be conducive to confirming the effects of lung recruitment manoeuvres [17] and 9 patients received it with immediate efficacy confirmation in the group DL.
Clinical implementation of quantitative neuromuscular monitoring remains limited by practicality constraints resulting in persistently high rates of postoperative residual curarization (PORC) [26], 27]. In addition, there is some uncertainty in the metabolism of neuromuscular blocking drugs, and PORC may occur when the antagonistic drug effect disappears. An observational study revealed that 18 % of patients maintained a train-of-four ratio (TOFr) <0.9 20 minutes after neostigmine administration [28]. In the absence of muscle monitoring, DTF measured by ultrasound can be used to evaluate the recovery of the diaphragm after operation, and for conscious patients, it is more comfortable than train-of-four (TOF) and can help anesthesiologists to detect PORC patients in PACU. In the group DL, we identified 8 patients (12.3 %) with DTF <30 % at T2 (15 min post-extubation), which was consistent with previous research results [29]. The results of this study showed that the DTF of the patient was the lowest at T1 (PACU admission), and began to increase at T1–T3 (PACU discharge), suggesting that the patient’s spontaneous breathing recovered after the operation, and the diaphragm and other respiratory muscle groups gradually recovered their contraction function. In the meantime, DTF at T3 was still lower than T0 (p<0.01), indicating that the contractile function of the diaphragm had not recovered to the preoperative awake state before the patient returned to the ward after spontaneous breathing, suggesting that the deep breathing function was impaired after the operation, which was consistent with the research results of Kim et al. [30].
While individual applications of lung or diaphragmatic ultrasound are established, their combined impact on respiratory recovery remained unverified. Integrating diaphragm-lung ultrasound with standard monitoring enables precision-guided interventions that significantly accelerate extubation and reduce hypoxemia incidence.
Hypoxemia represents a potentially life-threatening yet frequent perioperative complication. In our study, hypoxaemia was defined as PaO2/FiO2≤300 mmHg [15] rather than the indicator of SpO2. Studies have shown that when the inhaled oxygen concentration is 25–30 %, even if the patient has trespiratory depression and hypoventilation, the SpO2 remains above 95 % [31]. PaO2/FiO2 can better reflect the pulmonary oxygenation function of patients and the accuracy was greater than SpO2 under the condition of auxiliary oxygen supply [32]. Interestingly, inconsistent with the results of the incidence of hypoxemia in our study, there was no significant difference in SpO2 at each time point and the lowest SpO2 after extubation between the two groups of patients (Table 4), which may be related to the ability of auxiliary oxygen supply to cover up the abnormal respiratory function of patients after SpO2 detection. We expected that ultrasound assessment and intervention would reduce the incidence of postoperative pulmonary complications in patients. Although PPCs were numerically lower in the group DL (3.1 vs. 6.2 %), this difference lacked statistical significance (p>0.1). It may be related to limited sample size and absence of routine postoperative imaging.
This study still has the following limitations. Firstly, the feasibility of ultrasound assessment of diaphragm function has been confirmed, but it is easily interfered by factors such as BMI and sedation level. This experiment was not compared with other methods for assessing diaphragmatic function. Secondly, diaphragm and lung examination has high repeatability and feasibility, but its accuracy and effectiveness depend on the experience of the operator. Lastly, exclusion of patients with preexisting respiratory conditions limits generalizability to high-risk populations.
In summary, this study demonstrates that real-time assessment of pulmonary aeration and diaphragmatic function during anesthesia recovery facilitates rapid diagnosis of impairment etiology, early detection of PORC and targeted interventions accelerating respiratory recovery.
Acknowledgments
The authors appreciate the efforts of all those involved in the study and the members of the research team for their dedicated efforts in conducting the clinical trial and completing the follow-up.
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Funding information: This work was supported by the Health Commission of Jiangxi Province, 202310125.
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Author contribution: Shan-liang Guo: study design, methodology, Writing-Reviewing and Editing. Ping Zhang: Study design, Data analysis, study implementation. Wei-hong Huang: Data collection, writing – original draf. Long-cheng Fan: Data collection, Study design. Zhong-yu Liu: Data analysis, Software.
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Conflict of interest: The authors have no conflict of interest to declare.
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Data availability statement: The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Artikel in diesem Heft
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- Analysis of serum NLR combined with intraoperative margin condition to predict the prognosis of cervical HSIL patients undergoing LEEP surgery
- Commiphora gileadensis ameliorate infertility and erectile dysfunction in diabetic male mice
- The correlation between epithelial–mesenchymal transition classification and MMP2 expression of circulating tumor cells and prognosis of advanced or metastatic nasopharyngeal carcinoma
- Tetrahydropalmatine improves mitochondrial function in vascular smooth muscle cells of atherosclerosis in vitro by inhibiting Ras homolog gene family A/Rho-associated protein kinase-1 signaling pathway
- A cross-sectional study: Relationship between serum oxidative stress levels and arteriovenous fistula maturation in maintenance dialysis patients
- A comparative analysis of the impact of repeated administration of flavan 3-ol on brown, subcutaneous, and visceral adipose tissue
- Identifying early screening factors for depression in middle-aged and older adults: A cohort study
- Perform tumor-specific survival analysis for Merkel cell carcinoma patients undergoing surgical resection based on the SEER database by constructing a nomogram chart
- Unveiling the role of CXCL10 in pancreatic cancer progression: A novel prognostic indicator
- High-dose preoperative intraperitoneal erythropoietin and intravenous methylprednisolone in acute traumatic spinal cord injuries following decompression surgeries
- RAB39B: A novel biomarker for acute myeloid leukemia identified via multi-omics and functional validation
- Impact of peripheral conditioning on reperfusion injury following primary percutaneous coronary intervention in diabetic and non-diabetic STEMI patients
- Clinical efficacy of azacitidine in the treatment of middle- and high-risk myelodysplastic syndrome in middle-aged and elderly patients: A retrospective study
- The effect of ambulatory blood pressure load on mitral regurgitation in continuous ambulatory peritoneal dialysis patients
- Expression and clinical significance of ITGA3 in breast cancer
- Single-nucleus RNA sequencing reveals ARHGAP28 expression of podocytes as a biomarker in human diabetic nephropathy
- rSIG combined with NLR in the prognostic assessment of patients with multiple injuries
- Toxic metals and metalloids in collagen supplements of fish and jellyfish origin: Risk assessment for daily intake
- Exploring causal relationship between 41 inflammatory cytokines and marginal zone lymphoma: A bidirectional Mendelian randomization study
- Gender beliefs and legitimization of dating violence in adolescents
- Effect of serum IL-6, CRP, and MMP-9 levels on the efficacy of modified preperitoneal Kugel repair in patients with inguinal hernia
- Effect of smoking and smoking cessation on hematological parameters in polycythemic patients
- Pathogen surveillance and risk factors for pulmonary infection in patients with lung cancer: A retrospective single-center study
- Necroptosis of hippocampal neurons in paclitaxel chemotherapy-induced cognitive impairment mediates microglial activation via TLR4/MyD88 signaling pathway
- Celastrol suppresses neovascularization in rat aortic vascular endothelial cells stimulated by inflammatory tenocytes via modulating the NLRP3 pathway
- Cord-lamina angle and foraminal diameter as key predictors of C5 palsy after anterior cervical decompression and fusion surgery
- GATA1: A key biomarker for predicting the prognosis of patients with diffuse large B-cell lymphoma
- Influencing factors of false lumen thrombosis in type B aortic dissection: A single-center retrospective study
- MZB1 regulates the immune microenvironment and inhibits ovarian cancer cell migration
- Integrating experimental and network pharmacology to explore the pharmacological mechanisms of Dioscin against glioblastoma
- Trends in research on preterm birth in twin pregnancy based on bibliometrics
- Four-week IgE/baseline IgE ratio combined with tryptase predicts clinical outcome in omalizumab-treated children with moderate-to-severe asthma
- Single-cell transcriptomic analysis identifies a stress response Schwann cell subtype
- Acute pancreatitis risk in the diagnosis and management of inflammatory bowel disease: A critical focus
- Effect of subclinical esketamine on NLRP3 and cognitive dysfunction in elderly ischemic stroke patients
- Interleukin-37 mediates the anti-oral tumor activity in oral cancer through STAT3
- CA199 and CEA expression levels, and minimally invasive postoperative prognosis analysis in esophageal squamous carcinoma patients
- Efficacy of a novel drainage catheter in the treatment of CSF leak after posterior spine surgery: A retrospective cohort study
- Comprehensive biomedicine assessment of Apteranthes tuberculata extracts: Phytochemical analysis and multifaceted pharmacological evaluation in animal models
- Relation of time in range to severity of coronary artery disease in patients with type 2 diabetes: A cross-sectional study
- Dopamine attenuates ethanol-induced neuronal apoptosis by stimulating electrical activity in the developing rat retina
- Correlation between albumin levels during the third trimester and the risk of postpartum levator ani muscle rupture
- Factors associated with maternal attention and distraction during breastfeeding and childcare: A cross-sectional study in the west of Iran
- Mechanisms of hesperetin in treating metabolic dysfunction-associated steatosis liver disease via network pharmacology and in vitro experiments
- The law on oncological oblivion in the Italian and European context: How to best uphold the cancer patients’ rights to privacy and self-determination?
- The prognostic value of the neutrophil-to-lymphocyte ratio, platelet-to-lymphocyte ratio, and prognostic nutritional index for survival in patients with colorectal cancer
- Factors affecting the measurements of peripheral oxygen saturation values in healthy young adults
- Comparison and correlations between findings of hysteroscopy and vaginal color Doppler ultrasonography for detection of uterine abnormalities in patients with recurrent implantation failure
- The effects of different types of RAGT on balance function in stroke patients with low levels of independent walking in a convalescent rehabilitation hospital
- Causal relationship between asthma and ankylosing spondylitis: A bidirectional two-sample univariable and multivariable Mendelian randomization study
- Correlations of health literacy with individuals’ understanding and use of medications in Southern Taiwan
- Correlation of serum calprotectin with outcome of acute cerebral infarction
- Comparison of computed tomography and guided bronchoscopy in the diagnosis of pulmonary nodules: A systematic review and meta-analysis
- Curdione protects vascular endothelial cells and atherosclerosis via the regulation of DNMT1-mediated ERBB4 promoter methylation
- The identification of novel missense variant in ChAT gene in a patient with gestational diabetes denotes plausible genetic association
- Molecular genotyping of multi-system rare blood types in foreign blood donors based on DNA sequencing and its clinical significance
- Exploring the role of succinyl carnitine in the association between CD39⁺ CD4⁺ T cell and ulcerative colitis: A Mendelian randomization study
- Dexmedetomidine suppresses microglial activation in postoperative cognitive dysfunction via the mmu-miRNA-125/TRAF6 signaling axis
- Analysis of serum metabolomics in patients with different types of chronic heart failure
- Diagnostic value of hematological parameters in the early diagnosis of acute cholecystitis
- Pachymaran alleviates fat accumulation, hepatocyte degeneration, and injury in mice with nonalcoholic fatty liver disease
- Decrease in CD4 and CD8 lymphocytes are predictors of severe clinical picture and unfavorable outcome of the disease in patients with COVID-19
- METTL3 blocked the progression of diabetic retinopathy through m6A-modified SOX2
- The predictive significance of anti-RO-52 antibody in patients with interstitial pneumonia after treatment of malignant tumors
- Exploring cerebrospinal fluid metabolites, cognitive function, and brain atrophy: Insights from Mendelian randomization
- Development and validation of potential molecular subtypes and signatures of ocular sarcoidosis based on autophagy-related gene analysis
- Widespread venous thrombosis: Unveiling a complex case of Behçet’s disease with a literature perspective
- Uterine fibroid embolization: An analysis of clinical outcomes and impact on patients’ quality of life
- Discovery of lipid metabolism-related diagnostic biomarkers and construction of diagnostic model in steroid-induced osteonecrosis of femoral head
- Serum-derived exomiR-188-3p is a promising novel biomarker for early-stage ovarian cancer
- Enhancing chronic back pain management: A comparative study of ultrasound–MRI fusion guidance for paravertebral nerve block
- Peptide CCAT1-70aa promotes hepatocellular carcinoma proliferation and invasion via the MAPK/ERK pathway
- Electroacupuncture-induced reduction of myocardial ischemia–reperfusion injury via FTO-dependent m6A methylation modulation
- Hemorrhoids and cardiovascular disease: A bidirectional Mendelian randomization study
- Cell-free adipose extract inhibits hypertrophic scar formation through collagen remodeling and antiangiogenesis
- HALP score in Demodex blepharitis: A case–control study
- Assessment of SOX2 performance as a marker for circulating cancer stem-like cells (CCSCs) identification in advanced breast cancer patients using CytoTrack system
- Risk and prognosis for brain metastasis in primary metastatic cervical cancer patients: A population-based study
- Comparison of the two intestinal anastomosis methods in pediatric patients
- Factors influencing hematological toxicity and adverse effects of perioperative hyperthermic intraperitoneal vs intraperitoneal chemotherapy in gastrointestinal cancer
- Endotoxin tolerance inhibits NLRP3 inflammasome activation in macrophages of septic mice by restoring autophagic flux through TRIM26
- Lateral transperitoneal laparoscopic adrenalectomy: A single-centre experience of 21 procedures
- Petunidin attenuates lipopolysaccharide-induced retinal microglia inflammatory response in diabetic retinopathy by targeting OGT/NF-κB/LCN2 axis
- Procalcitonin and C-reactive protein as biomarkers for diagnosing and assessing the severity of acute cholecystitis
- Factors determining the number of sessions in successful extracorporeal shock wave lithotripsy patients
- Development of a nomogram for predicting cancer-specific survival in patients with renal pelvic cancer following surgery
- Inhibition of ATG7 promotes orthodontic tooth movement by regulating the RANKL/OPG ratio under compression force
- A machine learning-based prognostic model integrating mRNA stemness index, hypoxia, and glycolysis‑related biomarkers for colorectal cancer
- Glutathione attenuates sepsis-associated encephalopathy via dual modulation of NF-κB and PKA/CREB pathways
- FAHD1 prevents neuronal ferroptosis by modulating R-loop and the cGAS–STING pathway
- Association of placenta weight and morphology with term low birth weight: A case–control study
- Investigation of the pathogenic variants induced Sjogren’s syndrome in Turkish population
- Nucleotide metabolic abnormalities in post-COVID-19 condition and type 2 diabetes mellitus patients and their association with endocrine dysfunction
- TGF-β–Smad2/3 signaling in high-altitude pulmonary hypertension in rats: Role and mechanisms via macrophage M2 polarization
- Ultrasound-guided unilateral versus bilateral erector spinae plane block for postoperative analgesia of patients undergoing laparoscopic cholecystectomy
- Profiling gut microbiome dynamics in subacute thyroiditis: Implications for pathogenesis, diagnosis, and treatment
- Delta neutrophil index, CRP/albumin ratio, procalcitonin, immature granulocytes, and HALP score in acute appendicitis: Best performing biomarker?
- Anticancer activity mechanism of novelly synthesized and characterized benzofuran ring-linked 3-nitrophenyl chalcone derivative on colon cancer cells
- H2valdien3 arrests the cell cycle and induces apoptosis of gastric cancer
- Prognostic relevance of PRSS2 and its immune correlates in papillary thyroid carcinoma
- Association of SGLT2 inhibition with psychiatric disorders: A Mendelian randomization study
- Motivational interviewing for alcohol use reduction in Thai patients
- Luteolin alleviates oxygen-glucose deprivation/reoxygenation-induced neuron injury by regulating NLRP3/IL-1β signaling
- Polyphyllin II inhibits thyroid cancer cell growth by simultaneously inhibiting glycolysis and oxidative phosphorylation
- Relationship between the expression of copper death promoting factor SLC31A1 in papillary thyroid carcinoma and clinicopathological indicators and prognosis
- CSF2 polarized neutrophils and invaded renal cancer cells in vitro influence
- Proton pump inhibitors-induced thrombocytopenia: A systematic literature analysis of case reports
- The current status and influence factors of research ability among community nurses: A sequential qualitative–quantitative study
- OKAIN: A comprehensive oncology knowledge base for the interpretation of clinically actionable alterations
- The relationship between serum CA50, CA242, and SAA levels and clinical pathological characteristics and prognosis in patients with pancreatic cancer
- Identification and external validation of a prognostic signature based on hypoxia–glycolysis-related genes for kidney renal clear cell carcinoma
- Engineered RBC-derived nanovesicles functionalized with tumor-targeting ligands: A comparative study on breast cancer targeting efficiency and biocompatibility
- Relationship of resting echocardiography combined with serum micronutrients to the severity of low-gradient severe aortic stenosis
- Effect of vibration on pain during subcutaneous heparin injection: A randomized, single-blind, placebo-controlled trial
- The diagnostic performance of machine learning-based FFRCT for coronary artery disease: A meta-analysis
- Comparing biofeedback device vs diaphragmatic breathing for bloating relief: A randomized controlled trial
- Serum uric acid to albumin ratio and C-reactive protein as predictive biomarkers for chronic total occlusion and coronary collateral circulation quality
- Multiple organ scoring systems for predicting in-hospital mortality of sepsis patients in the intensive care unit
- Single-cell RNA sequencing data analysis of the inner ear in gentamicin-treated mice via intraperitoneal injection
- Suppression of cathepsin B attenuates myocardial injury via limiting cardiomyocyte apoptosis
- Influence of sevoflurane combined with propofol anesthesia on the anesthesia effect and adverse reactions in children with acute appendicitis
- Identification of hub genes related to acute kidney injury caused by sevoflurane anesthesia and endoplasmic reticulum stress
- 10.1515/med-2025-1313
- 10.1515/med-2025-1316
- Health education pathway for individuals with temporary enterostomies using patient journey mapping
- 10.1515/med-2025-1321
- 10.1515/med-2025-1324
- 10.1515/med-2025-1325
- 10.1515/med-2025-1327
- 10.1515/med-2025-1331
- Effect of timing of cholecystectomy on weight loss after sleeve gastrectomy in morbidly obese individuals with cholelithiasis: a retrospective cohort study
- 10.1515/med-2025-1337
- 10.1515/med-2025-1347
- 10.1515/med-2025-1360
- Multiple sclerosis and type 1 diabetes: a Mendelian randomization study of European ancestry
- Rapid pathogen identification in peritoneal dialysis effluent by MALDI-TOF MS following blood culture enrichment
- Comparison of open and percutaneous A1 pulley release in pediatric trigger thumb: a retrospective cohort study
- Impact of combined diaphragm-lung ultrasound assessment on postoperative respiratory function in patients under general anesthesia recovery
- Review Articles
- The effects of enhanced external counter-pulsation on post-acute sequelae of COVID-19: A narrative review
- Diabetes-related cognitive impairment: Mechanisms, symptoms, and treatments
- Microscopic changes and gross morphology of placenta in women affected by gestational diabetes mellitus in dietary treatment: A systematic review
- Review of mechanisms and frontier applications in IL-17A-induced hypertension
- Research progress on the correlation between islet amyloid peptides and type 2 diabetes mellitus
- The safety and efficacy of BCG combined with mitomycin C compared with BCG monotherapy in patients with non-muscle-invasive bladder cancer: A systematic review and meta-analysis
- The application of augmented reality in robotic general surgery: A mini-review
- The effect of Greek mountain tea extract and wheat germ extract on peripheral blood flow and eicosanoid metabolism in mammals
- Neurogasobiology of migraine: Carbon monoxide, hydrogen sulfide, and nitric oxide as emerging pathophysiological trinacrium relevant to nociception regulation
- Plant polyphenols, terpenes, and terpenoids in oral health
- Laboratory medicine between technological innovation, rights safeguarding, and patient safety: A bioethical perspective
- End-of-life in cancer patients: Medicolegal implications and ethical challenges in Europe
- The maternal factors during pregnancy for intrauterine growth retardation: An umbrella review
- Intra-abdominal hypertension/abdominal compartment syndrome of pediatric patients in critical care settings
- PI3K/Akt pathway and neuroinflammation in sepsis-associated encephalopathy
- Screening of Group B Streptococcus in pregnancy: A systematic review for the laboratory detection
- Giant borderline ovarian tumours – review of the literature
- Leveraging artificial intelligence for collaborative care planning: Innovations and impacts in shared decision-making – A systematic review
- Cholera epidemiology analysis through the experience of the 1973 Naples epidemic
- Risk factors of frailty/sarcopenia in community older adults: Meta-analysis
- Supplement strategies for infertility in overweight women: Evidence and legal insights
- Scurvy, a not obsolete disorder: Clinical report in eight young children and literature review
- A meta-analysis of the effects of DBS on cognitive function in patients with advanced PD
- Protective role of selenium in sepsis: Mechanisms and potential therapeutic strategies
- Strategies for hyperkalemia management in dialysis patients: A systematic review
- C-reactive protein-to-albumin ratio in peripheral artery disease
- 10.1515/med-2025-1251
- 10.1515/med-2025-1330
- 10.1515/med-2025-1332
- Antibiotic prescribing patterns in general dental practice- a scoping review
- Clinical and medico-legal reflections on non-invasive prenatal testing
- Case Reports
- Delayed graft function after renal transplantation
- Semaglutide treatment for type 2 diabetes in a patient with chronic myeloid leukemia: A case report and review of the literature
- Diverse electrophysiological demyelinating features in a late-onset glycogen storage disease type IIIa case
- Giant right atrial hemangioma presenting with ascites: A case report
- Laser excision of a large granular cell tumor of the vocal cord with subglottic extension: A case report
- EsoFLIP-assisted dilation for dysphagia in systemic sclerosis: Highlighting the role of multimodal esophageal evaluation
- Molecular hydrogen-rhodiola as an adjuvant therapy for ischemic stroke in internal carotid artery occlusion: A case report
- Coronary artery anomalies: A case of the “malignant” left coronary artery and its surgical management
- Combined VAT and retroperitoneoscopy for pleural empyema due to nephro-pleuric fistula in xanthogranulomatous pyelonephritis
- 10.1515/med-2025-1362
- Rapid Communication
- Biological properties of valve materials using RGD and EC
-
A single oral administration of flavanols enhances short
-term memory in mice along with increased brain-derived neurotrophic factor - Letter to the Editor
- Role of enhanced external counterpulsation in long COVID
- Expression of Concern
- Expression of concern “A ceRNA network mediated by LINC00475 in papillary thyroid carcinoma”
- Expression of concern “Notoginsenoside R1 alleviates spinal cord injury through the miR-301a/KLF7 axis to activate Wnt/β-catenin pathway”
- Expression of concern “circ_0020123 promotes cell proliferation and migration in lung adenocarcinoma via PDZD8”
- Corrigendum
- Corrigendum to “Empagliflozin improves aortic injury in obese mice by regulating fatty acid metabolism”
- Corrigendum to “Comparing the therapeutic efficacy of endoscopic minimally invasive surgery and traditional surgery for early-stage breast cancer: A meta-analysis”
- Corrigendum to “The progress of autoimmune hepatitis research and future challenges”
- Retraction
- Retraction of “miR-654-5p promotes gastric cancer progression via the GPRIN1/NF-κB pathway”
- Retraction of: “LncRNA CASC15 inhibition relieves renal fibrosis in diabetic nephropathy through downregulating SP-A by sponging to miR-424”
- Retraction of: “SCARA5 inhibits oral squamous cell carcinoma via inactivating the STAT3 and PI3K/AKT signaling pathways”
- Special Issue Advancements in oncology: bridging clinical and experimental research - Part II
- Unveiling novel biomarkers for platinum chemoresistance in ovarian cancer
- Lathyrol affects the expression of AR and PSA and inhibits the malignant behavior of RCC cells
- The era of increasing cancer survivorship: Trends in fertility preservation, medico-legal implications, and ethical challenges
- Bone scintigraphy and positron emission tomography in the early diagnosis of MRONJ
- Meta-analysis of clinical efficacy and safety of immunotherapy combined with chemotherapy in non-small cell lung cancer
- Special Issue Computational Intelligence Methodologies Meets Recurrent Cancers - Part IV
- Exploration of mRNA-modifying METTL3 oncogene as momentous prognostic biomarker responsible for colorectal cancer development
- Special Issue The evolving saga of RNAs from bench to bedside - Part III
- Interaction and verification of ferroptosis-related RNAs Rela and Stat3 in promoting sepsis-associated acute kidney injury
- The mRNA MOXD1: Link to oxidative stress and prognostic significance in gastric cancer
- Special Issue Exploring the biological mechanism of human diseases based on MultiOmics Technology - Part II
- Dynamic changes in lactate-related genes in microglia and their role in immune cell interactions after ischemic stroke
- A prognostic model correlated with fatty acid metabolism in Ewing’s sarcoma based on bioinformatics analysis
- Red cell distribution width predicts early kidney injury: A NHANES cross-sectional study
- Special Issue Diabetes mellitus: pathophysiology, complications & treatment
- Nutritional risk assessment and nutritional support in children with congenital diabetes during surgery
- Correlation of the differential expressions of RANK, RANKL, and OPG with obesity in the elderly population in Xinjiang
- A discussion on the application of fluorescence micro-optical sectioning tomography in the research of cognitive dysfunction in diabetes
- A review of brain research on T2DM-related cognitive dysfunction
- Metformin and estrogen modulation in LABC with T2DM: A 36-month randomized trial
- Special Issue Innovative Biomarker Discovery and Precision Medicine in Cancer Diagnostics
- CircASH1L-mediated tumor progression in triple-negative breast cancer: PI3K/AKT pathway mechanisms