[Mechanisms and influencing factors of hypoxemia after joint arthroplasty].
OBJECTIVE
To explore the mechanisms and influencing factors of hypoxemia after joint arthroplasty to further guide and improve clinical management.


METHODS
From January 2013 to May 2013, 135 patients undergoing joint arthroplasty were retrospectively analyzed. Perioperative pulse oximetry (SpO2) were measured and plotted. The effects of gender, age, body mass index (BMI), blood group, disease diagnosis, anesthesia, type of surgery, surgeon, anticoagulation method, hemoglobin changes (ΔHG), hematocrit changes (ΔHCT) and platelet changes (ΔPLT) on the postoperative hypoxemia and their predictive values were analyzed.


RESULTS
Univariate analysis showed that hypoxemia were associated with gender, age, diagnosis, type of surgery and anesthesia (P < 0.05). And multivariate linear regression analysis revealed that age was independently associated with postoperative hypoxemia.


CONCLUSIONS
Perioperative SpO2 changes have certain patterns. Asymptomatic hypoxemia is likely to occur within two days, especially during knee arthroplasty. As an independent factor, age impacts the incidence of hypoxemia after primary joint arthroplasty. For elderly patients, we should strengthen timely interventions for preventing life-threatening complications.
China-Japan Friendship Hospital, Department of Orthopedics, Beijing 100029, China.
Fuqiang
F
Gao
China-Japan Friendship Hospital, Department of Orthopedics, Beijing 100029, China. Email: guowanshou@263.net.
Wanshou
W
Guo
China-Japan Friendship Hospital, Department of Orthopedics, Beijing 100029, China.
Wei
W
Sun
China-Japan Friendship Hospital, Department of Orthopedics, Beijing 100029, China.
Zirong
Z
Li
China-Japan Friendship Hospital, Department of Orthopedics, Beijing 100029, China.
Weiguo
W
Wang
China-Japan Friendship Hospital, Department of Orthopedics, Beijing 100029, China.
Bailiang
B
Wang
China-Japan Friendship Hospital, Department of Orthopedics, Beijing 100029, China.
Liming
L
Cheng
D000368:Aged; D000369:Aged, 80 and over; D019643:Arthroplasty, Replacement / Q000009:adverse effects*; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D000860:Hypoxia / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D012189:Retrospective Studies