Jha Deepak K, Jha Ashutosh, Sharma Prem Prakash, Agrawal Mohit, Janu Vikas
Department of Neurosurgery, All India Institute of Medical Sciences, Jodhpur, India.
Department of Neurosurgery, Atal Bihari Vajpayee Institute of Medical Sciences & Dr. Ram Manohar Lohia Hospital, New Delhi 110001, India.
Clin Neurol Neurosurg. 2023 Mar;226:107633. doi: 10.1016/j.clineuro.2023.107633. Epub 2023 Feb 17.
Suction cannula (SC) is an important instrument for a neurosurgeon. Currently used suction control valves, kept in the sterile field, are controlled by the surgeon, for which he needs to leave the surgical dissection or by assistant or by operation room personnel to adjust the pressure of the equipment (suction machine or central suction), which lies in the unsterile field. Authors studied relationships of the different diameters of SC and the thumb hole (TH) of the SC and present their findings.
Seven SC with various diameters of their lumen and TH were used for the study. Suction pressures were measured with suction tip open, immersed in saline and TH open and closed. TH of 2 SC were made smaller using adhesive tape over the TH and making smaller hole over the tape and two additional measurements were taken using changed SC with modified TH. SPSS Statistics 23.0 (IBM India Pvt Ltd, Bangaluru, India) was used for statistical analysis of the pressure recordings and SC features.
Pressure and diameter of ST or TH were related in opposite direction. As the diameter increases the pressure decreases. A strong negative association was observed between the diameter of TH and the pressure.
TH diameter of SC is important to control suction pressure with any size of SC. One should use tear-drop type TH or appropriate diameter of the circular type of TH to contemplate safe microneurosurgery.
吸引套管（SC）是神经外科医生的重要器械。目前使用的吸引控制阀置于无菌区域，由外科医生控制，为此他需要离开手术解剖部位，或者由助手或手术室人员来调节位于非无菌区域的设备（吸引器或中央吸引装置）的压力。作者研究了不同直径的吸引套管及其拇指孔（TH）之间的关系并展示了他们的研究结果。
使用七根具有不同管腔直径和拇指孔直径的吸引套管进行研究。在吸引尖端打开并浸入盐水中、拇指孔打开和关闭的情况下测量吸引压力。用胶带覆盖两根吸引套管的拇指孔并在胶带上制作更小的孔，使拇指孔变小，然后使用拇指孔经过改良的更换后的吸引套管再进行两次测量。使用SPSS Statistics 23.0（IBM印度私人有限公司，班加罗尔，印度）对压力记录和吸引套管特征进行统计分析。
吸引套管或拇指孔的压力与直径呈相反方向的关系。随着直径增加，压力降低。在拇指孔直径与压力之间观察到强烈的负相关。
吸引套管的拇指孔直径对于控制任何尺寸吸引套管的吸引压力都很重要。为了进行安全的显微神经外科手术，应使用泪滴型拇指孔或适当直径的圆形拇指孔。
