ISSN:
1432-1238
Keywords:
Key words Phrenic nerve stimulation
;
Work of breathing
;
Oesophageal pressure
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract Objective: Five commercially available oesophageal balloon catheters (OBCs) were tested to evaluate the accuracy in transmitting fast-changing pressure signals which can be observed, for example, during phrenic nerve stimulation.¶Setting: Research laboratory of a university hospital.¶Method: The OBCs tested varied in length (900–1390 mm) and inner diameter (0.9–1.5 mm) as well as in balloon material [latex or polyvinyl-chloride (PVC)]. A 180-cm tube served as a control. A sudden pressure drop was generated by the explosion of a pressurized latex balloon. The time between the pressure drop and 75, 50, 25 and 10 % of the maximal pressure was measured.¶Results: The time intervals required to transduce a pressure drop of 90 % varied between the different OBCs from 85 to 476 ms(control 32 ms). Transmission time was lower in OBCs with a larger inner diameter. Shortening the OBCs resulted in a further decrease in transmission time.¶Conclusion: The type of OBC used has an impact on signal processing. An OBCs with a short transmission time should be chosen, especially if fast pressure changes are to be evaluated such as during phrenic nerve stimulation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s001340051182
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