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首页> 外文期刊>Journal of clinical neuroscience: official journal of the Neurosurgical Society of Australasia >Subdural haematomas complicating insertion of the low-pressure Novus hydrocephalus valve: a simple method for intra-operative testing of the anti-siphon device.
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Subdural haematomas complicating insertion of the low-pressure Novus hydrocephalus valve: a simple method for intra-operative testing of the anti-siphon device.

机译：硬膜下血肿使低压Novus脑积水阀的插入复杂化：术中测试抗虹吸装置的简单方法。

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摘要

We previously reported 52 patients with hydrocephalus who were followed up after insertion of low-pressure Novus valves. These valves have a normally open anti-siphon device (ASD) incorporated. There were no cases of subdural haematomas (SDH). Subsequently, three new patients suffered SDH after insertion of these valves. We investigated a simple method for intra-operative testing of the ASD. These new patients had their valves replaced. In the laboratory, flow rates through five valves were recorded as a function of proximal positive pressure and distal negative pressures (siphoning). The flow rates were influenced by both proximal positive and distal negative pressures. The ASD stopped flow at distal negative pressures between -40 and -60 cm H(2)O. Proximal positive pressures increased this threshold. The flow can be measured by counting drops per minute. Three valves removed from patients were functioning as expected, one had unexpectedly slow flow at very high siphoning pressure and one had unexpectedly slow flow rates. In three patients with SDH complicating low-pressure Novus valves, the valves and anti-siphon devices were functioning adequately. Using a simple device, measuring flow rates in drops per minute was reliable and reproducible.
机译：我们先前报道了52例脑积水患者，他们在插入低压Novus瓣膜后进行了随访。这些阀装有常开防虹吸装置（ASD）。没有硬膜下血肿（SDH）的病例。随后，三名新患者在插入这些瓣膜后遭受了SDH。我们研究了ASD术中测试的一种简单方法。这些新患者已更换了瓣膜。在实验室中，记录了通过五个阀门的流量与近端正压和远端负压（虹吸）的关系。流速受近端正压和远端负压的影响。 ASD在-40至-60 cm H（2）O的远端负压下停止流动。近端正压力增加了该阈值。流量可以通过计算每分钟的液滴数来测量。从患者体内取出的三个瓣膜均按预期工作，其中一个在非常高的虹吸压力下流量异常缓慢，而另一个在流速上异常缓慢。在3例SDH伴有低压Novus瓣膜并发症的患者中，这些瓣膜和抗虹吸装置正常运行。使用简单的设备，测量每分钟液滴的流量是可靠且可重复的。

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