Journal of Capital Medical University ›› 2021, Vol. 42 ›› Issue (1): 138-142.doi: 10.3969/j.issn.1006-7795.2021.01.023

• Clinical Research • Previous Articles     Next Articles

Local infiltration anesthesia for early analgesic effect after total knee arthroplasty

Zhao Xiaoxiong, Zhang Bo*, Ren Shixiang, Ma Desi, Chen Tong, Lin Yuan   

  1. Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
  • Received:2020-02-27 Online:2021-02-21 Published:2021-02-02
  • Contact: *E-mail:cums_2008@163.com

Abstract: Objective To evaluate the efficacy of local infiltration anesthesia(LIA) in different injection regions after total knee arthroplasty(TKA). Methods In our hospital, from March 2017 to June 2018, 100 patients underwent unilateral primary TKA due to knee osteoarthritis were prospectively studied. Random number grouping method was used to randomly divide into 2 groups:posterior and lateral infiltration anesthesia group (Group A) and anterior infiltration anesthesia group (group B). Group A received analgesic drugs inposterior and lateral area [interspace between the popliteal artery and posterior capsule of the knee (IPACK) and attachment of medial collateral ligament(MCL) and lateral collateral ligament(LCL)] and received normal saline(NS) 20 mL in anterior area (synovium of suprapatellar bursa, quadriceps tendon and incision). On the contrary, group B received 20 mL NS in posterior and lateral area, and received analgesic drugs in anterior area. The baseline information, preoperative and postoperative Visual Analogue Scale(VAS), American Knee Society Score(KSS) and The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) were recorded. In addition, the postoperative dosage of tramadol was also recorded. Results There was no significant difference and preoperative VAS between two groups. There was significant difference in postoperative VAS score between two groups at rest (P<0.05), but not at dynamic state (P>0.05). There was no significant difference in preoperative and postoperative KSS and WOMAC between the two groups (P>0.05). The average dose of tramadol used in group A was lower than that in group B, but there was no statistically significant difference (P>0.05). Conclusion Posterior and lateral local infiltration anesthesia was obviously effective after TKA than the anterior LIA at rest and can reduce the dosage of oral analgesics. We recommend to strengthen the infiltration analgesia in the posterior and lateral area of the knee joint rather than simplely anterior analgesia, such as wounds. Posterior and lateral LIA can effectively control early postoperative pain of TKA patients at rest.

Key words: total knee arthroplasty, pain management, anesthesia, infiltration

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