March 05, 2018
1 min read

Customized and conventional cutting instruments yielded similar results for TKA

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Results showed use of a customized cutting block during total knee arthroplasty yielded a reduced surgical time but similar alignment, hemodynamic changes, blood loss and knee functional outcomes compared with use of a conventional cutting instrument.

“This study systematically evaluated the outcome of customized cutting block (CCB) compared with conventional cutting instrument (CCI) using double-blind [randomized controlled trial],” Nattapol Tammachote, MD, MSc, co-author of the study, told “CCB provided similar alignment, hemodynamic changes, blood loss and knee functional outcomes compared with CCI, but it reduced surgical time by 11 minutes. CCB cost-effectiveness should be further investigated.”

Tammachote and colleagues randomly assigned 108 patients undergoing TKA for osteoarthritis to receive either CCB or CCI surgery. Primary outcome measures included limb alignment, prosthesis position and operative time. Secondary outcomes included hemodynamic alteration after surgery, functional outcomes and range of motion at 2 years after surgery.

Results showed patients in the CCB group and in the CCI group had a mean hip-knee-ankle angle of approximately 179.4° and 179.1°, respectively. Researchers found patients in the CCB group had a faster mean operative time vs. patients in the CCI group. However, hemodynamic parameters, mean blood loss, postoperative hemoglobin changes, incidence of hypotension, oliguria and rates of blood transfusion were similar between the two groups. Researchers also noted the groups had similar functional outcomes and range of motion. – by Casey Tingle

Disclosures: Tammachote reports he receives other financial or material support from Smith & Nephew. Please see the full study for a list of all other authors’ relevant financial disclosures.