Open Access

Body composition changes in the immediate peri-operative period following total joint arthroplasty

,  and   
Sep 09, 2022

Cite
Download Cover

Figure 1

Comparison of means of change in dry lean mass (DLM) and procedure from the pre-operative scan on the day of surgery to postoperative day 0 (POD0) and day 1 (POD1) for total hip and knee arthroplasty. *Denotes standard deviation
Comparison of means of change in dry lean mass (DLM) and procedure from the pre-operative scan on the day of surgery to postoperative day 0 (POD0) and day 1 (POD1) for total hip and knee arthroplasty. *Denotes standard deviation

Figure 2

Comparison of means of change in dry lean mass (DLM) and scanning position from the pre-operative scan on the day of surgery to post-operative day 0 (POD0) and day 1 (POD1). *Denotes standard deviation
Comparison of means of change in dry lean mass (DLM) and scanning position from the pre-operative scan on the day of surgery to post-operative day 0 (POD0) and day 1 (POD1). *Denotes standard deviation

The results of the paired t-test between changes in dry lean mass (DLM) and lean body mass (LBM) at different peri-operative time points_ Separate analyses by positioning (supine and seated – left side; supine – right side) are included_

Supine and Seated N = 67 Mean (SD) 95% CL SD t P Supine N = 47 Mean (SD) 95% CL SD t P
LBM (kg) DOS to POD0 1.67 (2.35) 2.01, 2.83 5.81 <0.0001 DOS to POD0 1.30 (2.14) 1.78, 2.68 4.21 <0.001
DOS to POD1 1.82 (2.55) 2.18, 3.08 5.82 <0.0001 DOS to POD1 1.16 (2.19) 1.82, 2.74 3.67 <0.001
POD0 to POD1 0.15 (2.42) 2.06, 2.91 0.51 0.614 POD0 to POD1 -0.14 (2.51) 2.08, 3.14 -0.39 0.701
DLM (kg) DOS to POD0 0.45 (0.67) 0.58, 0.81 5.53 <0.0001 DOS to POD0 0.36 (0.61 0.51, 0.76 4.08 <0.001
DOS to POD1 0.49 (0.72) 0.62, 0.87 5.53 <0.0001 DOS to POD1 0.32 (0.64) 0.53, 0.79 3.41 <0.001
POD0 to POD1 0.03 (0.70) 0.59, 0.84 0.38 0.705 POD0 to POD1 -0.04 (0.71) 0.59, 0.89 -0.42 0.679

The three most utilized metallic knee prostheses used during the study period_ Note, femoral (F) and tibial (T) components were matched in all patients_

Rank (N) Implant Brand and Model Mean Size
1 (13) MicroPort Evolution F: 5.2; T: 5.2
2 (11) DePuy Synthes Attune F: 5.7; T: 5.0
3 (10) Stryker Triathlon F: 5.4; T: 4.9

Demography of patients and select pre-operative markers_

Variable (units) Average (SD)
Age (years) 62.64 (10.28)
Male: Female (%) 50.8%: 49.2%
TKA: THA (%) 50.8%: 49.2%
Baseline BMI (kg/m2) 34.84 (7.56)
Baseline Weight (kg) 98.22 (25.81)
Baseline LBM (kg) 58.07 (14.41)
Baseline DLM (kg) 15.67 (3.67)

The three most commonly implanted metallic acetabular cups_

Rank (N) Implant Brand and Model Mean Size (mm)
1 (12) Zimmer-Biomet G7 55.2
2 (9) DePuy Synthes Pinnacle 54.7
3 (8) MicroPort Proctyl Prime 55.0

The three most commonly implanted metallic femoral stem prostheses_

Rank (N) Implant Brand and Model Mean Size
1 (10) DePuy Synthes Actis 5.9
2 (8) MicroPort Gladiator 4.6
3 (6) Zimmer-Biomet Echo 12.2