Electric impedance tomography for monitoring volume and size of the urinary bladder
-
Steffen Leonhardt
,
Harry Plewa
Abstract
A novel non-invasive technique for monitoring fluid content in the human bladder is described. Specifically, a precommercial electric impedance tomograph (EIT) was applied to measure and visualize impedance changes in the lower torso due to changes in bladder volume. Preliminary measurements were conducted during routine urodynamic tests of nine male paraplegic patients, in whom a contrast agent was slowly infused into the bladder for diagnostic purposes. In some patients, a good correlation between bladder volume and EIT measurements was found, whereas in others the correlation was still good but inverted, presumably due to a poor electrode positioning. These preliminary results indicate that a sufficiently accurate finite element modeling of the impedance distribution in the abdomen, and proper electrode positioning aids, are important prerequisites to enable this technology to be used for routine measurement of bladder volume.
©2011 by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Research Articles
- Electric impedance tomography for monitoring volume and size of the urinary bladder
- Improving local PCA in pseudo phase space for fetal heart rate estimation from single lead abdominal ECG
- Effect of malpositioned anterior cruciate ligament replacement on knee joint structures: a biomechanical model
- Pedicle-screw-based dynamic implants may increase posterior intervertebral disc bulging during flexion
- Influence of various types of damage on the fracture strength of ceramic femoral heads
- Psychophysiological classification and staging of mental states during meditative practice
- Can contextual online exams in practical biomedical education increase comprehension and motivation? A pilot project
