三腔两囊管头盔式固定装置及数显结构设计研究

Helmet fixing device and structure of digital display for Sengstaken-Blakemore tube

目的设计一种用于肝硬化食管胃静脉曲张破裂出血治疗的试验仪器,改变传统三腔两囊管从头至脚的牵拉固定方式,采用头盔式固定。使其压力、拉力保持合理的恒定,并实现数字电子监控、调控。使患者可以坐、立、卧,痛苦小,有利于治疗。方法针对传统三腔两囊管结构设计的缺点和不足,设计了头盔式固定装置,研制压力传感器、拉力传感器、节流阀、通气管、手动充气气囊等,实现拉力及压力数显并可调控。固定装置有两部分,一是设备固定,一是电子监控。结果该装置克服了传统悬吊式和鼻部固定式给患者带来的不利影响,减轻了患者在治疗过程中的痛苦;改变了以往拉力、压力不能实时监视及调控的困境;利用手动充气气囊和选择开关完成对不同气囊的充气,安全、方便快捷。临床模拟试用达到治疗使用要求。结论研制开发的仪器采用头盔式固定、拉力、压力荧光电子数显监视、调控,与传统方法相比功能优越。

Objective To design a test instrument for treatment of esophageal-gastric variceal bleeding in patients with liver cirrhosis, which adopts helmet fixing instead of retraction fixing method from head to foot of traditional Sengstaken-Blakemore tube. It keeps pressure and tension reasonably constant, and implement the digital electronic monitoring and control, so pa-tients could sit, stand, and lie down with less pain during treatment. Methods The helmet fixing was designed instead of the traditional Sengstaken-Blakemore tube, and tension sensor, throttle valve, ventilation tube and manual inflatable balloon were developed, so that the pressure and tension were digitally displayed and controlled by pressure sensor. The instrument consist-ed 2 parts： one was equipment fixing device, and the other was electronic monitoring device. Results The instrument alleviated the suffers of patients during treatment without adverse effects by traditional suspended fixing and nasal fixing, which made pressure and tension be monitored and controlled real-time. The manual inflatable balloon and switches were used to in-flate different balloons safely and conveniently, and clinical trials reached the therapeutic requirements. Conclusion It is demonstrated that the instrument adopts the helmet fixing, and the tension and pressure could be digitally monitored and con-trolled, which is superior than the traditional method.