Spacelabs公司动态血压监测仪的精确性得到了验证

 
在持续应用了6年之后，以项研究证实了Spacelabs医疗公司的动态血压监测器（ABP）的精确性。

研究人员使用了模拟器来常规检查15台Spacelabs公司ABP设备的精确性（大多数型号是90207），这些设备是从1998~2004年在英国爱丁堡的西部总医院心血管风险诊所中使用的。研究方案设计用于测试设备在低血压、正常血压和高血压条件下的状态。检查记录的数据评估设备的远期的协调性和可靠性。

在被检测的1920套设备中，只有1套超出了Spacelabs使用模拟波形记录所预期的通常认可的压力范围，而且这套设备超出界限只有1mmHg。协调性标准要求设备记录的收缩压、舒张压、和平均动脉压的标准差在2mmHg以内，至少2/3在2mmHg以内。在测试中，设备记录到的平均压力有几乎90%的数值，在连续检测间隙都在2mmHg之内，绝大多数都小于1mmHg。

心血管风险诊所的内科医生Sister Gough解释说：“在西部总医院，在第一次临床咨询之前，每1位在心血管风险诊所的患者都接受了24小时动态血压监测。Spacelabs的动态血压监测在我们诊所得到了很好使用。监测器被计划在24小时的时间内，按照30分钟的循环记录血压，而且鼓励患者在日常活动中继续佩带监测器监测血压。我们的监测成功率超过了95%。”

西部总医院的维护记录显示，大多数血压监测设备需要中断维持的机会，每3年不到1次，没有设备需要维修的次数超过每年以一次。

Valdidating Blood Pressure Monitors
 
Following six years of continuous use, a study has validated the accuracy of the ambulatory blood pressure (ABP) monitors of Spacelabs Medical (Issaquah, WA, USA).

The researchers used a simulator to routinely check the accuracy of 15 Spacelabs ABP devices (most were model 90207) in use at the Cardiovascular Risk Clinic at the Western General Hospital in Edinburgh (UK) from 1998-2004. The protocol was designed to test the devices over a range of low, normal, and high pressures. The records were examined to assess the long-term consistency and reliability of the devices.

Out of the 1,920 sets measured, only one was outside the generally accepted limits of the pressure expected from the Spacelabs records with the simulated waveforms, and that one exceeded the limits by only 1 mmHg. The criteria for consistency call for the standard deviation of the systolic, diastolic, and mean arterial pressures recorded to be within 3 mmHg, with at least two-thirds within 2 mmHg. In the test, nearly 90% of the average pressures recorded by any device remained within 2 mmHg of their recordings at successive test intervals. Most differences were less than 1 mmHg.

“At the Western General Hospital each patient referred to the Cardiovascular Risk Clinic has 24-hour ambulatory blood pressure monitoring prior to their first clinical consultation,” explained Sister Gough, a physician at the Cardiovascular Risk Clinic. “Spacelabs ambulatory blood pressure monitors are used exclusively at our clinic. The monitors are programmed to record blood pressure measurements at 30-minute cycles over a 24-hour period and patients are encouraged to continue with their normal daily activities while wearing the monitor. We achieve a monitoring success rate in excess of 95%.”

Maintenance records at the Western General Hospital showed that most blood pressure monitoring devices required breakdown maintenance less than once every three years, with no devices requiring repair more than once a year.