Chinese Journal of Tissue Engineering Research ›› 2019, Vol. 23 ›› Issue (24): 3773-3779.doi: 10.3969/j.issn.2095-4344.1287

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Correlation of local skin temperature of knee joint with C-reactive protein, interleukin 6 and erythrocyte sedimentation rate after primary unilateral total knee arthroplasty

Zang Wenhao1, Song Jian2, Teng Xueren3, Zhang Qiliang3   

  1. 1Shandong First Medical University, Taian 271000, Shandong Province, China; 2Department of Orthopedics, Rizhao City Juxian Hospital of Chinese Medicine, Rizhao 276800, Shandong Province, China; 3Department of Bone Joint and Sports Medicine, Eastern Branch of Qingdao Municipal Hospital, Qingdao 266000, Shandong Province, China
  • Online:2019-08-28 Published:2019-08-28
  • Contact: Zhang Qiliang, MD, Associate chief physician, Department of Bone Joint and Sports Medicine, Eastern Branch of Qingdao Municipal Hospital, Qingdao 266000, Shandong Province, China
  • About author:Zang Wenhao, Master candidate, Shandong First Medical University, Taian 271000, Shandong Province, China

Abstract:

BACKGROUND: Periprosthetic infection is a most serious complication after total knee arthroplasty. It often causes the increase of local skin temperature. Skin temperature measurement is convenient and easy to implement.
OBJECTIVE: To understand the association of local skin temperature of the affected knee joint, with C-reactive protein, interleukin 6 and erythrocyte sedimentation rate after primary unilateral total knee arthroplasty without complications.
METHODS: Seventy patients undergoing primary unilateral total knee arthroplasty without complications at Department of Bone and Joint, Qingdao Municipal Hospital from January 2017 to January 2018 were selected. Informed consents were obtained from all patients and the study was approved by the Ethics Committee of the hospital. The local skin temperatures of both knee joints were measured at preoperative 1 day, and postoperative 1, 3, 6, 9, and 12 days and 1, 2, 3, 6, 9, and 12 months. The fasting blood samples were collected at baseline and 1, 3, 6, 9, and 12 days and 1, 2, and 3 months postoperatively to detect the C-reactive protein, interleukin 6 and erythrocyte sedimentation rate. The data were analyzed statistically.
RESULTS AND CONCLUSION: (1) Skin temperature of the affect knee at postoperative 1, 3, 6, 9, and 12 days and 1, 2, 3, and 6 months was significantly higher than the baseline and the healthy knee (P < 0.05), and showed no significant difference at postoperative 9 and 12 months (P > 0.05). Skin temperature of both knees reached a peak at 1 day postoperatively, which gradually declined in the following nine months and returned to normal at 9 months postoperatively. (2) The interleukin 6 level at 1, 3, 6, and 9 days postoperatively was higher than preoperatively (P < 0.05), and returned to normal at 12 days postoperatively. C-reactive protein level at 1, 3, 6, 9, and 12 days postoperatively was higher than preoperatively (P < 0.05), and returned to normal at 1 month postoperatively. Interleukin 6 and C-reactive protein levels both reached a peak at 1 day postoperatively. Erythrocyte sedimentation rate at 1, 3, 6, 9, and 12 days and 1 month postoperatively was higher than preoperatively (P < 0.05), and returned to normal at 2 months postoperatively. Erythrocyte sedimentation rate reached a peak at 6 days postoperatively. (4) These results indicate that knee temperature, C-reactive protein, interleukin 6 and erythrocyte sedimentation rate have normal fluctuation, increase after surgery and return to normal gradually after total knee arthroplasty without complication. Changes of skin temperature are correlated with inflammatory indexes. The degree of inflammatory response can be assessed by detecting changes in skin temperature and it can be used to monitor early infection. Furthermore, it is not necessary to worry about the increased knee temperature if there are no other evidence of infection.

Key words: knee arthroplasty, skin temperature of knee joint, postoperative infection, C-reactive protein, interleukin 6, erythrocyte sedimentation rate, inflammatory response

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