Westenskow D R, Silva F H
Department of Anesthesiology, University of Utah, Salt Lake City.
Crit Care Med. 1993 Sep;21(9):1365-8. doi: 10.1097/00003246-199309000-00021.
The most serious complication seen with pulmonary artery catheters is rupture of the pulmonary artery. The effectiveness of an external safety balloon added to the pulmonary artery balloon inflation port was tested.
The external balloon is designed to inflate and absorb excess volume from the inflation syringe after the internal balloon contacts the vessel wall. When the catheter tip is in a small pulmonary artery, expansion of the external balloon indicates that the catheter tip is in a noncompliant or small vessel.
The external balloon was tested in a bench simulation.
None.
The pulmonary artery balloon was slowly inflated inside 2.6-, 3.0-, 4.7-, 8.6-, and 11.6-mm internal diameter polyvinyl chloride tubes, with and without the external safety device in place. Without the external balloon, the average balloon pressure was 1647 +/- 145 (SD) mm Hg in the 2.6-mm vessel. With the external balloon in use, the maximum pulmonary artery balloon pressure was 473 +/- 7.2 mm Hg in the 2.6-mm vessel.
The external balloon can limit balloon pressures within the pulmonary artery and identify when excessive volumes are being forced into the pulmonary artery balloon.
肺动脉导管最严重的并发症是肺动脉破裂。测试了在肺动脉球囊充气管路中添加外部安全球囊的有效性。
外部球囊设计为在内部球囊接触血管壁后充气并吸收来自充气注射器的过量容积。当导管尖端位于小肺动脉中时，外部球囊的膨胀表明导管尖端位于顺应性差或小的血管中。
在台架模拟中测试外部球囊。
无。
在有和没有外部安全装置的情况下，将肺动脉球囊在内径为2.6、3.0、4.7、8.6和11.6毫米的聚氯乙烯管内缓慢充气。没有外部球囊时，在2.6毫米血管中球囊平均压力为1647±145（标准差）毫米汞柱。使用外部球囊时，在2.6毫米血管中肺动脉球囊最大压力为473±7.2毫米汞柱。
外部球囊可限制肺动脉内的球囊压力，并识别何时有过量容积被强行注入肺动脉球囊。
