Kim E H, Kopecky K K, Cummings O W, Dreesen R G, Pound D C
Department of Radiology, Indiana University School of Medicine, Indianapolis.
Invest Radiol. 1993 Mar;28(3):228-30. doi: 10.1097/00004424-199303000-00008.
Bleeding is the most common complication of needle biopsy of the liver. This study was designed to assess the feasibility of using unipolar electrocautery to decrease bleeding.
Under general anesthesia, the livers of eight dogs were surgically exposed. A mean of 15 biopsies was obtained with 18-gauge needles from each liver by alternating biopsies without and with electrocautery. Cautery was performed by applying radiofrequency energy at 25 watts (6 animals) or 125 watts (2 animals) to the needle as the needle was withdrawn from the liver. Blood loss was measured by applying preweighed sponges to the biopsy site, then reweighing them after use. Biopsy specimens were examined by light microscopy.
The mean (+/- SD) blood loss was 0.44 g (+/- 1.36 g) with electrocautery and 1.47 g (+/- 2.23 g) without electrocautery (P < .01). No thermal injury was noted in the biopsy specimens when cautery was applied at 25 watts.
The application of radiofrequency current to the biopsy needle after liver biopsy is a feasible and effective method to reduce blood loss in our canine model.
出血是肝脏穿刺活检最常见的并发症。本研究旨在评估使用单极电灼减少出血的可行性。
在全身麻醉下，手术暴露8只犬的肝脏。通过交替进行不使用电灼和使用电灼的活检，从每只肝脏用18号针平均获取15次活检样本。当针从肝脏中拔出时，通过以25瓦（6只动物）或125瓦（2只动物）的射频能量施加于针上来进行电灼。通过将预先称重的海绵应用于活检部位，然后在使用后重新称重来测量失血量。活检标本进行光学显微镜检查。
使用电灼时平均（±标准差）失血量为0.44克（±1.36克），不使用电灼时为1.47克（±2.23克）（P <.01）。当以25瓦进行电灼时，活检标本中未观察到热损伤。
在我们的犬类模型中，肝脏活检后将射频电流应用于活检针是一种可行且有效的减少失血量的方法。
