Engesaeter L B, Strand T, Raugstad T S, Husebø S, Langeland N
Arch Orthop Trauma Surg (1978). 1984;103(5):328-31. doi: 10.1007/BF00432420.
In 18 patients who underwent total hip replacement, the intramedullary pressure in the femur was measured during the insertion of the femoral prosthesis component. Half the patients had a pressure release hole (diameter 4.5 mm) drilled into the medullary canal at the distal end of the femur, the other half not. In the patients without a venting hole, the intramedullary pressure increased transiently to a median of 390mmHg during the insertion of the femoral stem, while those with a venting hole only showed an increase to 23mmHg. A drop in arterial oxygen tension of 2.2kPa and in thrombocytes of 51 x 10(9)/1 was found in those without a venting hole, while the corresponding values in those with a venting hole were 0.9kPa and 20 x 10(9)/1. Furthermore, a significant correlation was demonstrated between the increase in intramedullary pressure and the drop in oxygen tension and in blood platelets. No significant change in blood pressure was measured during operation in either group.
在18例行全髋关节置换术的患者中，在植入股骨假体部件过程中测量了股骨的髓内压力。一半患者在股骨远端的髓腔内钻了一个减压孔（直径4.5毫米），另一半则没有。在没有通气孔的患者中，在插入股骨干时髓内压力短暂升高至中位数390mmHg，而有通气孔的患者仅升高至23mmHg。在没有通气孔的患者中，动脉血氧张力下降了2.2kPa，血小板下降了51×10⁹/升，而有通气孔的患者相应值分别为0.9kPa和20×10⁹/升。此外，髓内压力升高与血氧张力和血小板下降之间存在显著相关性。两组患者术中血压均未出现显著变化。
