Shimizu Yukiyo, Kamada Hiroshi, Sakane Masataka, Aikawa Shizu, Mutsuzaki Hirotaka, Tanaka Kenta, Mishima Hajime, Kanamori Akihiro, Nishino Tomofumi, Ochiai Naoyuki, Yamazaki Masashi
1 Department of Rehabilitation Medicine, University of Tsukuba Hospital, Tsukuba, Ibaraki, Japan.
2 Department of Orthopaedic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.
J Orthop Surg (Hong Kong). 2017 Sep-Dec;25(3):2309499017739477. doi: 10.1177/2309499017739477.
Venous thromboembolism prophylaxis is crucial. To facilitate active ankle movement in postoperative and bedridden patients, we developed a novel leg exercise apparatus (LEX). We investigated the effect of the LEX by comparing increases in lower extremity venous flow during different modes of exercise using the LEX.
In eight healthy participants, we measured venous flow volume and velocity in the femoral vein using duplex ultrasonography at 1, 10, 20, and 30 min after completing three modes of 1-min LEX exercises. The exercises involved (1) rapid single motion (ankle dorsi-plantar flexion; 60 cycles/min); (2) slow single motion (30 cycles/min); and (3) slow combined leg motion.
Flow volumes after modes 1, 2, and 3 were 1.63-, 1.39-, and 1.53-fold above baseline at 30 min, respectively. Short periods of rapid single motion, with the LEX, improved postexercise lower extremity venous flow volumes at 30 min and mean venous flow velocity at 20 min, compared to slow single motion exercise. Even at slow speeds, combined-motion improved flow volume compared to single motion.
Short periods of rapid single motion exercise, with the LEX, improved postexercise venous flow volumes in the lower extremities at 30 min and mean venous flow velocity at 20 min. These effects were greater than those produced by slow single motion exercises. However, even at slow speeds, combined-motion exercises improved flow volume compared to single motion. Therefore, LEX may prove effective at preventing thromboembolism in postoperative and bedridden patients.
静脉血栓栓塞预防至关重要。为便于术后及卧床患者进行主动踝关节活动，我们研发了一种新型腿部锻炼器械（LEX）。我们通过比较使用LEX进行不同运动模式时下肢静脉血流的增加情况，来研究LEX的效果。
在八名健康参与者中，我们在完成三种1分钟的LEX锻炼模式后1、10、20和30分钟，使用双功超声测量股静脉中的静脉血流量和流速。锻炼模式包括：（1）快速单动作（踝关节背屈 - 跖屈；60次/分钟）；（2）慢速单动作（30次/分钟）；以及（3）慢速双腿联合动作。
模式1、2和3后的血流量在30分钟时分别比基线高出1.63倍、1.39倍和1.53倍。与慢速单动作锻炼相比，使用LEX进行短时间的快速单动作可改善运动后30分钟时的下肢静脉血流量以及20分钟时的平均静脉流速。即使在慢速时，联合动作与单动作相比也能改善血流量。
使用LEX进行短时间的快速单动作锻炼可改善运动后30分钟时的下肢静脉血流量以及20分钟时的平均静脉流速。这些效果大于慢速单动作锻炼所产生的效果。然而，即使在慢速时，联合动作锻炼与单动作相比也能改善血流量。因此，LEX可能在预防术后及卧床患者的血栓栓塞方面被证明是有效的。
