论文部分内容阅读
目的 观察着穿囊式防护装备时不同衣压与余压比,不同囊覆盖面积条件下加压呼吸对血压的影响。为供氧防护装备鉴定和加压呼吸训练提供生理指标参考。方法 6名男性志愿者,年龄18～20岁,分别穿着囊覆盖面积为45％、65％、90％的DKT囊式代偿抗荷通风一体化防护服,进行余压值分别为 30、50、70 mm Hg的地面吸纯氧加压呼吸。每种余压值加压时间为 3 min,间隔 10 min,衣压与余压比为 4:1、3:1、2:1。每名受试者完成 3种囊式装备、3种余压值、3种压力比的加压呼吸。结果 加压后平均动脉压较试验前明显增加,但加压呼吸3 min内平均动脉压变化无统计学显著性差异(P<0.05)。随加压值增加平均动脉压明显增高(P<0.05),压力比愈大时,增加愈明显。随着囊覆盖面积的增加或衣压与余压比值的增加,平均动脉压逐渐增高,但在45％囊覆盖面积组和2:1压力比组,平均动脉压变化的差异无统计学意义。结论 在评价加压呼吸心血管功能状态时平均动脉压可作为衡量机体代偿能力的有效指标。
Objective To observe the effect of pressure breathing on blood pressure under different clothing pressure and residual pressure ratio and different capsule coverage under the condition of wearing protective equipment. For oxygen protection equipment identification and pressure breathing training to provide physiological indicators for reference. Methods Six male volunteers aged 18 to 20 years old were enrolled in this study. They were wearing DKT cystic compensatory anti-air ventilation integrated protective clothing with capsule coverage area of 45%, 65% and 90%, respectively. The residual pressure values were 30, , 70 mm Hg inhalation of pure oxygen pressurized breathing. The pressure time of each residual pressure value is 3 min, the interval is 10 min, and the ratio of pressure and pressure is 4: 1, 3: 1, 2: 1. Each subject completed three kinds of capsule equipment, three residual pressure values, three kinds of pressure than the pressure of breathing. Results The mean arterial pressure increased significantly after the compression compared with that before the test. However, there was no significant difference in the mean arterial pressure within 3 min after pressurized breathing (P <0.05). The mean arterial pressure was significantly increased with increasing pressure (P <0.05). The greater the pressure ratio, the more obvious the increase. Mean arterial pressure increased gradually with the increase of capsule coverage or the ratio of clothing pressure and residual pressure. However, there was no significant difference in mean arterial pressure between 45% capsule coverage area and 2: 1 pressure ratio group. Conclusions Mean arterial pressure can be used as a good measure of body compensatory capacity in assessing CPB status.