全膝关节置换术中止血带使用方法对围手术期失血量及术后早期并发症的影响

目的探讨不同止血带使用方法在全膝关节置换（TKA）术中对围手术期失血量及术后早期并发症的影响。方法行单侧TKA的100例膝关节骨性关节炎,随机分成全程组（手术开始至假体安装完成使用止血带）和短时组（术中截骨完成后至假体安装完成使用止血带）,记录2组手术时间、使用止血带时间、肢体肿胀程度、围手术期总失血量、输血率、术后是否能主动直腿抬高、有无大腿疼痛,比较2组间的差异。结果2组间围手术期总失血量差异无统计学意义（P=0．380）;短时组输血率明显低于全程组（P〈0．001）;短时组术后早期并发症的发生率较全程组明显降低（P〈0．001）。结论TKA术中短时应用止血带并未增加围手术期总失血量,可降低输血率以及术后早期并发症的发生率,有利于患者术后早期康复。     

TKA术后放置引流与否对围手术期失血量的影响

目的 比较初次单侧全膝关节置换(MA)术后膝关节腔内放置引流与否对对围手术期失血量的影响.方法 初次行TKA 60例,分为引流组和非引流组,每组各30例.通过Gross方程推算总失血量(显性失血量+隐性失血量),对两组患者计算结果 进行回顾性分析.结果 引流组总失血量平均为(785.3t293.0)ml,显性失血量平均...     

半程使用止血带对全膝关节置换术围手术期失血量和早期功能恢复的影响

目的探讨半程使用止血带对全膝关节置换术（TKA）围手术期失血量和早期功能恢复的影响。方法设计前瞻性随机对照研究,将64例符合纳入条件的患者随机分为2组：半程使用止血带32例（半程组）,全程使用止血带32例（全程组）。记录围手术期失血量,术后1、3、7 d大腿及膝关节VAS疼痛评分,术后至能完成直腿抬高和屈膝90°的时间,下肢深静脉血栓发生率,并进行组间比较。结果半程组术中失血量（257.8±105.1）ml,稍高于与全程组的（213.8±87.4）ml,但差异无统计学意义（P〉0.05）;半程组术后引流量（195.3±89.1）ml,低于全程组的（280.2±114.5）ml,差异有统计学意义（P〈0.05）;半程组预估失血量（561.0±165.1）ml,也低于全程组的（673.0±201.3）ml,差异有统计学意义（P〈0.05）。半程组大腿肿胀率低于全程组,术后第3天组间差异有统计学意义（P〈0.05）。半程组完成直腿抬高的时间（1.5±0.9）d,早于全程组的（1.9±1.1）d,差异无统计学意义（P〉0.05）;半程组完成屈膝90°的时间（1.8±1.1）d,也早于全程组的（2.7±1.2）d,差异有统计学意义（P〈0.05）。结论 TKA术中半程使用止血带能减少围手术期失血量,并可改善患肢早期疼痛评分及肿胀程度,有利于患者早期功能恢复。     

两种止血带使用方式对150例全膝关节置换术患者失血量和术后康复影响的前瞻性随机对照研究

背景:围手术期失血是全膝关节置换术(TKA)的一个主要问题,止血带的应用可以有效减少术中出血,但缺乏充足的科学依据证实手术患者能从止血带的使用中获益。目的:探讨术中全程使用止血带与安装假体至切口缝合包扎完毕间使用止血带对TKA患者围手术期失血量和功能恢复的影响。方法:前瞻性选取2018年8月至2019年10月接受初次单侧TKA的150例膝关节骨关节炎患者,术中全程使用止血带的75例为全程组,仅在安装假体至切口缝合包扎完毕使用止血带的75例为半程组。记录并比较两组患者的失血量、术后患肢周径增加率、术后VAS评分和HSS评分、ROM,术后血栓及切口并发症发生情况,并通过实验室检查测定手术前、后的IL-6,CRP以及肌酸激酶。结果:全程组术后显性失血量小于半程组,隐性失血大于假体组,差异有统计学意义(P<0.05);两组总失血量相当,差异无统计学意义(P>0.05);全程组术后大腿肿胀比和小腿肿胀比高于半程组,差异有统计学意义(P<0.05);全程组术后VAS评分高于半程组,差异有统计学意义(P<0.05);术后两组HSS评分均明显升高,半程组HSS评分高于全程组,差异有统计学意义(P<0.05);半程组术后5 d的ROM优于全程组,差异有统计学意义(P<0.05)。全程组术后15例出现不同程度的血栓(13例肌间静脉血栓及2例深静脉血栓形成),5例出现切口感染,半程组术后4例出现肌间静脉血栓,3例出现切口感染,差异有统计学意义(P<0.05)。半程组的术后血清IL-6、CRP、肌酸激酶水平均低于全程组,差异有统计学意义(P<0.05)。结论:全程使用止血带还是仅在安装假体至切口缝合包扎完毕使用止血带,尽管在显性失血量和隐形失血量存在差异,但总失血量方面并无差异,后者可以减轻术后疼痛肿胀的程度,降低术后血栓的发生率及炎症指标,术后膝关节功能也得到较快恢复。     

应用止血带对人工全膝关节置换术的影响研究

目的通过临床随机对照研究,探讨人工全膝关节置换术中应用止血带对术后疼痛和早期康复、失血量、血栓发生率的影响。方法将2014年1月-2015年8月收治并符合选择标准的166例因膝关节骨关节炎行单侧初次人工全膝关节置换术的患者纳入研究。根据术中是否使用止血带,将患者随机分为止血带组(n=84)及非止血带组(n=82)。两组患者性别、年龄、体质量指数、置换侧别、骨关节炎分级、病程以及术前膝关节活动度(range of motion,ROM)、疼痛视觉模拟评分(VAS)、美国特种外科医院(HSS)评分、血红蛋白(hemoglobin,Hb)比较,差异均无统计学意义(P0.05),具有可比性。观察并比较两组手术时间、住院时间,术毕至膝关节主动屈膝90°、完成直腿抬高和下地行走的时间,术中失血量以及术后3 d Hb较术前下降值,术后VAS评分、HSS评分、ROM,并记录术后并发症发生情况。结果两组手术时间比较差异无统计学意义(t=—1.353,P=0.178)。患者均获随访,止血带组随访时间3~20个月,平均12个月;非止血带组3~22个月,平均13个月。术后止血带组及非止血带组分别有9例(10.71%)、2例(2.44%)发生血栓形成,20例(23.81%)、21例(25.61%)输血,两组血栓发生率比较差异有统计学意义(χ2=4.592,P=0.032),输血率比较差异无统计学意义(χ2=0.072,P=0.788)。术后3 d,两组Hb下降值比较差异无统计学意义(t=—1.855,P=0.066)。止血带组术中失血量显著低于非止血带组(t=—16.066,P=0.000)。术后止血带组患者完成主动屈膝90°、直腿抬高、下地行走的时间以及住院时间均较非止血带组显著延长(P0.05)。除28 d外,非止血带组3、5、7、14 d VAS评分均明显低于止血带组(P0.05)。术后28 d,非止血带组HSS评分高于止血带组,差异有统计学意义(t=—4.192,P=0.000);两组ROM比较差异无统计学意义(t=0.676,P=0.500)。结论与不使用止血带相比,人工全膝关节置换术中使用止血带总体失血量及术后输血率无明显降低,但术后膝关节疼痛程度及血栓形成发生风险均明显增加,不利于早期康复。     

双侧膝关节置换术围手术期的康复护理

人工膝关节置换术是缓解关节疼痛、矫正畸形、改善患肢功能、提高患者生活质量最有效的手术之一。随着康复医学的发展，临床上康复护理的深入开展，对患者的心理与肢体运动功能最大限度的康复，重新参加社会生活起到了积极的作用。全膝关节置换术后疗效优良率的高低在排除手术技术因素外，很大程度上取决于术后的康复训练。我院自2003年3月至2004年10月对双膝关节骨性关节炎16例、类风湿性关节炎5例，共21例双侧全膝关节置换的患者实施了系列围手术期的康复护理，使患者最大限度地恢复功能，愉快地重返社会，收到了满意的效果，现将我科的康复护理经验总结如下。     

氨甲环酸不同给药途径对膝关节置换失血量的影响

[目的]探讨氨甲环酸不同给药途径对全膝关节置换术失血量的影响。[方法]120例拟行初次单侧全膝关节置换术患者,随机分为A、B、C、D四组,每组30例。A组在缝合关节囊后经引流管向关节腔内灌注溶于50ml生理盐水的氨甲环酸(tranexamic acid,TXA)1 g;B组术前0.5 h静滴TXA 20 mg/kg+100 ml生理盐水;C组关闭关节囊前关节周围软组织注射TXA 1 g+100 ml生理盐水;D组在缝合关节囊后向关节腔内灌注50 ml生理盐水。记录围手术期失血量、输血量、输血率、术后血红蛋白浓度和术后3 h纤维蛋白原、凝血酶原时间、活化部分凝血活酶时间、皮下瘀斑、深静脉血栓形成、患膝周径变化率等指标。[结果]A、B、C三组和D组两两比较,围手术期失血量、输血量和输血率明显减少,差异有统计学意义(P<0.05),A、B、C三组组间比较差异无统计学意义(P>0.05);术后血红蛋白浓度A、B、C三组明显高于D组(P<0.05),A、B、C三组组间比较差异无统计学意义(P>0.05);四组患者术后3 h纤维蛋白原、凝血酶原时间和活化部分凝血活酶时间比较差异无统计学意义(P>0.05)。A、B、C三组皮下瘀斑率和患膝周径变化率低于D组,差异有统计学意义(P<0.05)。术后未发现下肢深静脉血栓形成及肺梗塞、心肌梗塞、脑梗塞等血栓相关事件发生。[结论]在全膝关节置换术中应用TXA能明显减少围手术期失血量,降低输血率和输血量,尤其是关节腔内灌注TXA既可以减少失血又可以避免静脉给药可能带来的并发症。     

复合保温措施对全髋关节置换术围手术期失血影响研究

[目的]探讨全髋关节置换术围手术期中应用复合保温措施干预对显性失血及隐性失血的影响。[方法]将2014年8月～2016年10月在本院行生物型人工全髋关节置换术的患者,共60髋,随机分为两组,每组各30髋。分为复合保温干预组和常规组。复合保温组采取可控式电热保温毯、输入液加温、控制手术室温度等措施;常规组不予复合保温体温干预。评估两组麻醉30 min、麻醉60 min、麻醉90 min、手术结束时体温的变化,两组患者手术中出血量及术后引流量情况,以及术前、术后血红蛋白含量变化及计算术中的隐性失血量。[结果]复合保温组麻醉30 min、麻醉60 min、麻醉90 min、手术结束时体温均高于对照组,差异有统计学意义(P0.05)。复合保温组在术中出血量、术后引流量及隐性失血量均少于对照组,差异有统计学意义(P0.05)。术后血红蛋白水平,复合保温组高于对照组,差异有统计学意义(P0.05)。[结论]围手术期复合保温干预措施在全髋关节置换中能有效减少术中、术后显性失血量、隐性失血量。     

全膝关节置换术中使用止血带对围手术期失血量影响的 Meta 分析

目的：探讨在成人全膝关节置换（ TKA）术中使用止血带,能否降低围手术期的失血量。方法计算机检索PubMed （1966～2013.8）、EMbase （1974－2013.8）、WanFang Data 、SinoMed （1978－2012.8）、CNKI等数据库,查找涉及在TKA术中使用与不使用止血带的临床随机对照试验,并查看相关文献的引文。遵照纳入和排除标准对所选文献进行评价分析,并提取数据,运用RevMan5.2软件分析,利用Gradeprofiler 3.2行证据质量评估。结果共纳入研究6个,408例患者。止血带组手术时间较短[MD ＝－6.18,95％CI （－11.33,－1.02）, P ＝0.02],术中出血量少[MD＝－191.81,95％CI （－294.77,－88.85）,P＝0.0003],术后出血量差异无统计学意义[MD ＝77.99,95％CI （－17.14,－173.12）,P ＝0.11],预计出血量差异无统计学意义[MD ＝－30.5,95％CI （－154.22,－93.21）,P ＝0.63]。 GRADE评估结果显示,证据水平均为高级,推荐强度为强烈推荐。结论在TKA手术中使用止血带,能降低术中失血量,但并不能减少围手术期总的失血量。     

56例人工全膝关节置换术的围手术期护理

目的:探讨人工全膝关节置换术围手术期的护理,减轻患者的心理负担,提高患者生活质量.方法:对56例病人在术前注重心理及常规护理;术后预防并发症.结果:56例患者均安全度过围手术期,有效减少并发症,均取得满意效果.结论:全膝关节置换术围术期护理是手术成功的关键因素之一.     

充气止血带在膝关节置换术中的应用观察

目的探讨膝关节置换术中充气止血带的使用方法。方法回顾性研究我院自2005年1月至2008年12月,326例在我院行初次单侧膝关节置换手术患者的临床资料,根据术中止血带不同的使用方法,分为三组,A组126例,在假体安装完毕、骨水泥固化后放松止血带,术野充分止血后关闭切口;B组142例,在关闭切口,加压包扎后放松止血带;C组58例,未使用止血带。观察三组患者术中和术后失血、总失血量以及术后深静脉栓塞(DVT)并发症发生率。结果A组患者术中失血(242±120)ml和术后失血(214±156)ml,总失血量(467±232)ml,DVT发生率12.7%;B组患者术中失血(224±116)ml和术后失血(387±160)ml,总失血量(610±252)ml,DVT发生率26.8%;C组患者术中失血(463±246)ml和术后失血(184±112)ml,总失血量(654±303)ml,DVT发生率12.1%。结论膝关节置换术中使用充气止血带,在假体安装完毕、骨水泥固化后再放松止血带止血的方法能够减少围手术期失血,而且不增加DVT的发生率,是一种较好的止血带使用方法,对提高临床护理质量有重要意义。     

Hemostatic matrix effects on blood loss after total knee arthroplasty: A randomized controlled trial

Background:

Total knee arthroplasty (TKA) can result in major postoperative blood loss which can impact on the recovery and rehabilitation of patients. It also requires expensive transfusions. The purpose of the study was to investigate whether a hemostatic matrix, composed of cross-linked gelatin and a thrombin solution, would reduce blood loss in patients following TKA.

Materials and Methods:

This was a prospective, randomized, controlled study (Trial registration: Hospital S. Salvatore L’Aquila {"type":"entrez-protein","attrs":{"text":"ADJ00843","term_id":"299023578"}}ADJ00843) conducted in 93 patients. Criteria for participation were unilateral TKA for osteoarthritis, and a preoperative hemoglobin level >13 g/dL. The outcomes measured were postoperative hemoglobin and hematocrit levels measured at 24h, 72 h, and 7 days. The mean total postoperative blood loss was calculated from drainage volume, patient blood volume, hematocrit, and red blood cell volume. In addition, the drain output within 24 h following surgery and any transfusion requirements were determined.

Results:

Hemostatic matrix-treated patients (n = 51) showed significant reductions in calculated postoperative blood loss of 32.3% and 28.7% versus control in men and women, respectively (P < 0.01). Postoperative blood loss after 24 h in drain was significantly less with the hemostatic matrix versus control, as were decreases in hemoglobin levels 7 days post-surgery (each P < 0.01). Three patients in the control group required blood transfusion, whereas no blood transfusions were necessary in the hemostatic matrix group.

Conclusion:

The use of a hemostatic matrix provides a safe and effective means to reduce blood loss and blood transfusion requirements in TKA.     

Comparision of blood loss between computer assisted and conventional total knee arthroplasty

Background:

Bleeding during total knee arthroplasty (TKA) can cause significant morbidity and mortality. One proposed benefit of computer assisted TKA is decreased bleeding as the femoral canal is not invaded. This study assessed blood loss between computer assisted surgery (CAS) and conventional TKA.

Materials and Methods:

73 consecutive patients (37 males, 36 females) underwent primary TKA between 2006 and 2009. Thirty eight patients underwent navigated TKA and 35 underwent conventional TKA for symptomatic osteoarthritis of the knee. These patients were matched for age, gender, and body mass index (BMI). Average age was 70.3 years (range 47-91 years). Mean BMI was 30 (range 17-49). Average preoperative hemoglobin was 13.26 g/dL (range 8.7-18.4 g/dL) in the navigated group and 13.47 g/dL (range 9.6-15.8 g/dL) in the conventional group (P = 0.9). Average tourniquet time was 110 min (range 90-150 min) in the navigated group and 96.7 min (range 60-145 min) in the conventional group (P = 0.77).

Results:

Average postoperative hemoglobin in the navigated group was 10.34 g/dL (range 7.5-14.8 g/dL) and in the conventional group was 10.03 g/dL (range 7.5-12.2 g/dL) (P = 0.17). Six patients in both groups required blood transfusions. The mean drain collection was 599 mL (range 150-1370 mL) in the navigated group and 562 mL (range 750-1000 mL) in the conventional group (P = 0.1724). These results suggest that there is no significant reduction in blood loss in CAS TKA.

Conclusion:

These results suggest that there is no significant difference in blood loss in CAS TKA and conventional TKA. This study also highlights the heterogeneity of methods used in studies related to CAS TKA. We believe that there is a need for a large multicenter prospective randomized controlled trial to be performed before a consensus can be reached on the influence of CAS techniques on blood loss during primary TKA.     

Assessment of perioperative total blood loss during total ankle arthroplasty

BackgroundAlthough many authors have discussed total blood loss after arthroplasty of the knee, hip, and shoulder, reports on perioperative blood loss after total ankle arthroplasty (TAA) are rare. The purpose of this study was to assess total blood loss after TAA and to identify correlated factors.MethodsA total of 103 cases (99 patients) of TAA for end-stage ankle osteoarthritis were enrolled in this study. Perioperative total blood loss was divided into intraoperative and postoperative blood loss. The patient-related variables evaluated for total blood loss were age, sex, body mass index, American Society of Anesthesiologists Classification score, comorbidities, history of previous ankle surgery, preoperative use of anticoagulants, platelet count and prothrombin time/international normalized ratio. Operation-related variables including type of anesthesia, operation time, TAA implant, and procedures performed in addition to TAA (if any) were evaluated to analyze correlations with total blood loss. In addition, the rate of transfusions after surgery was identified, and risk factors for transfusion were statistically analyzed.ResultsThe total blood loss was mean 795.5 ± 351.1 mL, which included 462.2 ± 248.5 mL of intraoperative blood loss and 333.2 ± 228.6 mL of postoperative blood loss. Sex, TAA implant, and additional bony procedures performed along with TAA were significantly correlated with total blood loss (p = 0.039, 0.024, 0.024, respectively) but the other variables were not significant (p > 0.05). Transfusions were administered for 4 cases (3.8%) but no risk factors for transfusion could be identified.ConclusionThe total blood loss after TAA was 795.5 mL and the rate of transfusions was 3.8%. This study demonstrated that male sex, use of TAA implants with a larger cutting surface, and bony procedures performed in addition to TAA were associated with an increase in total blood loss after TAA. The findings of this study will help surgeons to better predict blood loss and make optimal surgical plans accordingly.Level of evidenceLevel IV, retrospective case series.     

Perioperative blood loss in cementless or hybrid total knee arthroplasty without patellar resurfacing: a prospective, randomized study

The use of cement is considered as an important way to control perioperative blood loss in knee arthroplasty. We prospectively randomized 57 patients (60 knees) who underwent total knee arthroplasty with (30 knees) or without (30 knees) tibial cement to evaluate perioperative blood loss. The measured total blood loss did not differ significantly between the 2 groups (with tibial cement, 731 +/- 288 mL; without cement, 731 +/- 331 mL; P = .9117). The red blood cell count, hemoglobin level, and hematocrit returned to the preoperative levels within 3 months in both groups. Therefore, tibial cement does not appear to affect perioperative blood loss. This finding has implications when planning blood replacement in cementless and hybrid-type arthroplasties.     

The influence of a half-course tourniquet strategy on peri-operative blood loss and early functional recovery in primary total knee arthroplasty

Purpose

The aim of this study was to explore the influence of a half-course tourniquet strategy on the peri-operative blood loss and early functional recovery in primary total knee arthroplasty.

Methods

A prospective clinical randomised controlled study was carried out in which 64 patients were equally divided into two groups: half-course group and whole-course group. A series of indicators were observed and recorded. These included operation time, peri-operative blood loss, visual analogue scale (VAS) score of the thigh or knee, limb swelling index, rehabilitation progress and occurrence of deep venous thrombosis cases.

Results

There was no significant difference in operation time between the two groups. The intra-operative blood loss was slightly more in the half-course group, while the difference was not significant. The post-operative blood loss and calculated blood loss were less in the half-course group and the difference was significant. The thigh VAS score, limb swelling and time intervals required for patients to achieve straight leg raises and 90° of knee flexion in the half-course group were better than in the whole-course group. No case of symptomatic deep venous thrombosis happened in this study, while occult incidence of deep venous thrombosis happened in both groups, but no significant difference between the groups was confirmed.

Conclusions

The half-course tourniquet strategy could decrease the total peri-operative blood loss in primary total knee arthroplasty. It was beneficial in helping patients to achieve earlier functional recovery by improving the pain experience and limb swelling early in the post-operative period.     

初次全膝关节置换术后肢体肿胀程度与隐性失血量的相关性研究

[目的]膝关节置换术后下肢肢体肿胀是术后常见现象,隐性失血为其可能的原因之一.本研究旨在分析初次全膝关节置换术后隐性失血对肢体肿胀程度的影响.[方法]对2007年10月～2009年8月接受全膝关节置换术的286例患者进行回顾性分析,按照术后有无下肢深静脉血栓形成分为血栓组(65例)和无血栓组(221例),通过围手术期血红蛋白变化值来推算隐性失血量(Hbl),还计算出术后第2～5 d的术侧下肢膝上10 cm及膝下10 cm周径较术前相比周径增加的平均值D-up及D-down.[结果]在无血栓组,隐性失血量对术侧下肢膝上膝下肢体周径变化均造成影响,具有统计学意义(P＜0.001),分别建立线性回归方程,在血栓组,隐性失血量对术侧下肢膝上膝下肢体周径变化影响不大,两者Pearson相关分析不具有统汁学意义(P=0.110,P=0.066),有无血栓组间经两独立样本t检验,发现两组间D-up、D-down和Hhl的差异均没有统计学意义,P值分别为0.334,0.156,0.180.[结论]初次全膝关节置换术后,特别是3～5 d内,应持续关注患者血色素的变化,隐性失血量与下肢的肿胀程度呈相关性,在一定程度上形成并加重了肢体肿胀.TKA术后下肢肌间静脉丛血栓形成对远端肢体肿胀程度影响不大,考虑后者主要还是与隐性失血有关.     

减少全膝关节置换术围手术期出血的探讨

背景：全膝关节置换术（TKA）是关节外科失血较多的手术之一,如何有效降低TKA围手术期失血一直是关节外科医师研究的重点。 目的：通过术中选择性应用止血带及术后适当关闭引流管对TKA失血量的影响,探讨减少TKA围手术期失血量的方法。方法：2013年1月至2013年5月,因膝骨关节炎拟行单膝TKA患者53例,根据术中应用止血带方式及术后引流管开放形式分为两组。观察组30例,采用截骨完成后短期应用止血带联合术后早期夹闭4 h引流管;对照组23例,术中全程使用止血带及术后引流管处于自然开放引流状态。记录术中出血量及术后引流量,根据患者身高、体重和手术前后红细胞压积（Hct）,通过Gross方程计算患者的总失血量,进而得出隐性失血量,记录两组术后输血的病例数,并计算平均输血单位,记录术后1、3、5 d的晨起体温,记录出院前后膝关节功能评分（HSS）。 结果：观察组的术中出血量明显多于对照组,术后引流量少于对照组,总出血量及隐性失血量少于对照组,均存在统计学差异（P＜0.05）;观察组的输血例数及平均输血单位均少于对照组;两组的围手术期晨起体温、膝关节HSS功能评分无统计学差异（P＞0.05）。 结论：采用截骨完成后短期应用止血带联合术后早期夹闭4 h引流管可明显减少TKA围手术期出血量。     

止血带释放时机对全膝关节置换术失血的影响

目的 探讨止血带释放时机对全膝关节置换术(TKA)失血的影响.方法 2006年6月至2008年6月,80例TKA患者随机分为两组,每组40例.A组:释放止血带彻底止血后关闭切口,B组:关闭切口弹力绷带包扎后释放止血带.比较两组患者的失血量、输血例数、手术时间、止血带使用时间及膝关节屈曲度.结果 A组术中失血量[(161.5±50.1)mL]多于B组((70.0±19.4)mL],术后失血量[(357.8±104.7)mL]少于B组[(467.9±116.0)mLl,总失血量[(516.8±107.9)mL]少于B组[(579.5±140.2)mL],差异均有统计学意义(P＜0.05);但两组输血例数差异无统计学意义(P＞0.05).A组手术时间为(77.7±14.6)min,B组为(73.6±17.5)min,两组比较差异无统计学意义(P＞0.05).A组止血带使用时间为(69.4±14.4)min,B组为(73.6±17.5)min,两组比较差异无统计学意义(P＞0.05).术后1周膝关节屈曲A组为93°、B组为84°,术后2周A组为113°、B组为103°,两组比较差异均有统计学意义(P＜0.05);但8周后A组膝关节屈曲为117°、B组为113°,差异无统计学意义(P＞0.05).结论 释放止血带彻底止血后关闭切口可减少手术总失血量.