The use of intraoperative cell salvage in total hip arthroplasty with subtrochanteric shortening osteotomy for the treatment of high hip dislocation: a retrospective cohort study.

BACKGROUND

Intraoperative cell salvage (ICS) is an important component of blood management in patients undergoing orthopedic surgery. However, the role of ICS is less well defined in total hip arthroplasty (THA) with subtrochanteric shortening osteotomy (SSO) which is a common surgical technique to manage high hip dislocation. This study aimed to determine the effect of ICS during THA with SSO and to identify factors associated with the ability to salvage sufficient collection for reinfusion in patients with high hip dislocation.

METHODS

We identified 178 patients who underwent THA with SSO for high hip dislocation between November 2010 and April 2021. The consecutive cohort was analyzed by logistic regression to determine the effect of ICS on postoperative allogeneic blood transfusion (ABT) and to explore the associations between patient demographics, clinical and radiographic characteristics, preoperative laboratory examination, and surgical variables with the ability to generate adequate blood salvage to reinfuse.

RESULTS

In the consecutive cohort of 178 patients, cell salvage was reinfused in 107 patients (60.1%) and postoperative allogeneic red blood cell (RBC) transfusion within 3 days of implantation was administrated in 40 patients (22.5%). In multivariate analysis, the reinfusion of ICS (OR (95%CI) 0.17 (0.07-0.47)), center of rotation (COR) height ≥ 60 mm (OR (95%CI) 3.30 (1.21-9.01)), the length of SSO ≥ 30 mm (OR (95%CI) 2.75 (1.05-7.22)) and the use of drainage (OR (95%CI) 2.28 (1.04-5.03)) were identified as independent factors of postoperative allogeneic RBC transfusion. In addition, the following variables were identified as independent factors associated with the ability to generate sufficient blood salvage volume for reinfusion: COR height ≥ 60 mm (OR (95%CI) 3.47 (1.58-7.61)), limb-length discrepancy (LLD) ≥ 25 mm (OR (95%CI) 2.55 (1.15-5.65)) and length of SSO ≥ 30 mm (OR (95%CI) 2.75 (1.33-5.69)).

CONCLUSIONS

ICS was efficacious in reducing the exposure rate of postoperative RBC transfusion for high hip dislocation during THA with SSO. In addition, patients with greater COR height, larger LLD, and longer length of SSO were predisposed to generate sufficient collection for reinfusion in THA with SSO.