Balloon vena cava cannula

Abstract

The invention belongs to the technical field of medical instruments and discloses a balloon vena cava cannula. According to the invention, a balloon is arranged at a front end position, communicates with an injector through a thin catheter passage and is arranged in a vena cava; a vein cannula is integrally arranged between the balloon and a vein cavity; and a front end side hole of the vena cavacannula is arranged at the tail end of the vein cannula. By application of the balloon vena cava cannula provided by the invention in the extracorporeal circulation surgery process of the cardiac surgery department, the step that vena cava passes through a blocking band during construction of extracorporeal circulation in a conventional cardiac surgery can be omitted, so the operation time of thesurgery can be greatly shortened, and the risk of side damage to the local part of the heart due to the fact that upper vena cava and lower vena cava pass through the blocking band can be avoided at the same time; for situations like adhesion at the positions where the upper vena cava and the lower vena cava pass through the blocking band and inconvenience in passing through the blocking band dueto small surgery field of a minimally invasive cardiac surgery, the balloon vena cava cannula provided by the invention can omit the trouble and the risk caused by construction of extracorporeal circulation through stripping decomposition or application of unconventional intubation means like femoral vein intubation for an operator.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a balloon vena cava cannula. Background technique [0002] At present, the existing technology commonly used in the industry is as follows: when establishing extracorporeal circulation in cardiac surgery, it is necessary to intubate the proximal end of the superior and inferior vena cava, and then use external vascular resistance at the intubation place of the superior and inferior vena cava. The broken band surrounds the vena cava, and before opening the heart for surgery, it is necessary to block the superior and inferior vena cava with a blocking band around the cannula, so that blood returning to the heart cannula enters the extracorporeal circulation from the superior and inferior vena cava, and does not enter the heart. This ensures that the heart surgery field is bloodless and clear. However, the current method of blocking the superior and inferior vena cava in cl...

AI Technical Summary

Problems solved by technology

However, the current method of blocking the superior and inferior vena cava in clinical practice not only increases the operation time, but also causes side damage to the heart when passing through the blocking band, and there are adhesions and minimally invasive minimally invasive procedures where the superior and inferior vena cava passes through the band. Cardiac surgery, etc., unable to complete the superior and inferior vena cava over-occlusion zone and thus cannot guarantee the occlusion of the vena cava

[0003] To sum up, the problem existing in the prior art is that the current clinical application of blocking bands to block the superior and inferior vena cava is not suitable for minimally invasive heart surgery where the superior and inferior vena cava passes through the blocking band, where there is adhesion, and the space is small. Conducive to complete vena cava occlusion

[0004] Difficulty in solving the above-mentioned technical problems: At present, the clinical solution to the adhesion of the superior and inferior vena cava over the occlusion zone is mainly based on intraoperative stripping, decomposition of adhesions, and anatomical exposure. Cardiac surgery is mainly based on femoral vein cannulation to establish extracorporeal circulation. However, these methods all have many risks of heart rupture when peeling and dissolving adhesives, and femoral vein cannulation causing local damage to the femoral vein during the operation.

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