Percutaneous dilational tracheostomy (PDT) and prevention of blood aspiration with superimposed high-frequency jet ventilation (SHFJV) using the tracheotomy-endoscope (TED): results of numerical and experimental simulations
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Andreas Nowak
,
Robin Langebach
Abstract
We describe an innovative computer-based method for the analysis of gas flow using a modified airway management technique to perform percutaneous dilatational tracheotomy (PDT) with a rigid tracheotomy endoscope (TED). A test lung was connected via an artificial trachea with the tracheotomy endoscope and ventilated using superimposed high-frequency jet ventilation. Red packed cells were instilled during the puncture phase of a simulated percutaneous tracheotomy in a trachea model and migration of the red packed cells during breathing was continuously measured. Simultaneously, the calculation of the gas-flow within the endoscope was numerically simulated. In the experimental study, no backflow of blood occurred during the use of superimposed high-frequency jet ventilation (SHFJV) from the trachea into the endoscope nor did any transportation of blood into the lower respiratory tract occur. In parallel, the numerical simulations of the openings of TED show almost positive volume flows. Under the conditions investigated there is no risk of blood aspiration during PDT using the TED and simultaneous ventilation with SHFJV. In addition, no risk of impairment of endoscopic visibility exists through a backflow of blood into the TED. The method of numerical simulation offers excellent insight into the fluid flow even under highly transient conditions like jet ventilation.
©2012 by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Original Articles
- Comparing measured and simulated wave directions in the left atrium – a workflow for model personalization and validation
- Computer aided approximation of flow rate through systemic-pulmonary arterial shunts (SPAS)
- Comparison of flow dynamics of Perimount Magna and Magna Ease aortic valve prostheses
- Percutaneous dilational tracheostomy (PDT) and prevention of blood aspiration with superimposed high-frequency jet ventilation (SHFJV) using the tracheotomy-endoscope (TED): results of numerical and experimental simulations
- Development of a test system to analyze different hip fracture osteosyntheses under simulated walking
- Influence of cementless hip stems on femoral cortical strain pattern depending on their extent of porous coating
- A portable magnetic induction measurement system (PIMS)
- Differentiation of enamel lesion activity by vertical reflection intensity – a methodical description
- Masthead
- Masthead
