Department of Small Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
VCA Vancouver Animal Emergency and Referral Centre, Vancouver, British Columbia, Canada.
Vet Surg. 2021 Aug;50(6):1276-1282. doi: 10.1111/vsu.13654. Epub 2021 May 7.
To determine the influence of continuous and intermittent bolus irrigation on vertebral canal temperature during thoracolumbar hemilaminectomy.
Ex vivo study.
Ten canine cadavers.
Six consecutive thoracolumbar hemilaminectomies starting at T12-13 with alternating left- or right-side selection, and alternating continuous or intermittent bolus irrigation were performed in each dog resulting in 30 hemilaminectomies per irrigation technique. Drilling was performed for 15 s followed by a 10-s pause and resumed until completion of hemilaminectomy. Continuous irrigation consisted of saline delivered at 15 ml/min during drilling. Bolus irrigation consisted of manual delivery of 10 ml saline during the pause. Temperatures were recorded with two sensors placed within the vertebral canal adjacent to target hemilaminectomy site and compared between techniques with a linear mixed model.
Intermittent bolus irrigation was associated with lower peak vertebral canal temperatures (mean 15.7°C; range 9.4-23.3°C) than continuous irrigation (mean 16.7°C; range 9.6-27.6°C, p = .003) (mean difference of 1.1°C, p = .006). Similarly, mean vertebral canal temperatures remained lower when hemilaminectomies were performed under intermittent rather than continuous irrigation (mean difference of 0.48°C, p = .006, linear mixed model).
Lower vertebral canal temperatures were maintained during hemilaminectomy with intermittent bolus rather than continuous irrigation.
Both intermittent bolus and continuous irrigation are suitable to prevent elevations in canine vertebral canal temperature during hemilaminectomy.
确定胸腰椎半椎板切除术期间连续和间歇推注冲洗对椎管温度的影响。
离体研究。
10 只犬尸体。
在每只犬中连续进行 6 次胸腰椎半椎板切除术，从 T12-13 开始，左右侧交替选择，交替采用连续或间歇推注冲洗，每种冲洗技术各进行 30 次半椎板切除术。钻孔持续 15s，然后暂停 10s，继续直到半椎板切除完成。连续冲洗是在钻孔过程中以 15ml/min 的速度输送生理盐水。推注冲洗是在暂停期间手动输送 10ml 生理盐水。使用放置在椎管内与目标半椎板切除部位相邻的两个传感器记录温度，并使用线性混合模型比较两种技术之间的差异。
间歇推注冲洗的峰值椎管温度（平均 15.7°C；范围 9.4-23.3°C）低于连续冲洗（平均 16.7°C；范围 9.6-27.6°C，p=0.003）（平均差异 1.1°C，p=0.006）。同样，当半椎板切除术在间歇而不是连续冲洗下进行时，平均椎管温度也较低（平均差异 0.48°C，p=0.006，线性混合模型）。
与连续冲洗相比，间歇推注冲洗可在半椎板切除术中维持较低的椎管温度。
间歇推注和连续冲洗都适用于防止犬椎管温度在半椎板切除术中升高。
