Short-term knee flexion during stair ascent in total knee arthroplasty patients

C. Govind, D. Komaris, P. Riches, J. Clarke, F. Picard, A. Ewen

Research output: Contribution to conferencePoster

Abstract

Stair ascent is a demanding activity which requires around 85° of knee flexion. Analysing this task may give an indication of Total Knee Arthroplasty (TKA) joint function. This study looked at short-term outcomes to give information regarding initial recovery after TKA surgery. Three-dimensional motion analysis was carried out on five healthy control participants and five TKA patients (Columbus®, B. Braun Aesculap, Tuttlingen) performing five stair ascents at their own self-selected pace, choosing whether or not to use handrails. Control data were recorded at one assessment and patient data both pre-operatively and at mean follow up of 10 weeks (8 to 12) post-operatively. The maximum knee flexion achieved during stair ascent was calculated. Four patients walked with a step over step strategy enabling comparison with the control group. There was no change in mean flexion angle from pre-operative to post-operation for either the operated side [mean pre-operatively=84° (76°-94°) vs. 82° (79°-86°) post-operatively , paired t-test p=0.67] or the non-operated side [mean pre-operatively=81° (61°-87°) vs. 81° (70°-95°) postoperatively, paired t-test p=0.56]. This was lower than mean for the control group, 97° (90°-106°) t-test p<0.001. The pre- and post-operative flexion angles of the patient who walked with a step by step strategy was 55° and 56° on the operated side and 43° and 52° on the non-operated side. Knee flexion during stair ascent was similar both pre- and at 10 weeks post operation. Post-operative function did not reach control group values. The large variation between individuals for flexion of the non-operated side may represent different strategies for stair ascent: higher angles to achieve a greater ground clearance for safety, or lower angles to allow the patient to ascend faster so the operated support leg spends less time under load. Further work on a larger number of patients is required to understand this finding.

Conference

ConferenceBritish Orthopaedic Research Society
Abbreviated titleBORS 2016
CountryUnited Kingdom
CityGlasgow
Period5/09/166/09/16
Internet address

Fingerprint

Knee Replacement Arthroplasties
Knee
Control Groups
Knee Joint
Leg
Healthy Volunteers
Safety

Keywords

  • stair ascent
  • knee anthroplasty
  • surgery recovery
  • post-operative
  • flexion angles

Cite this

Govind, C., Komaris, D., Riches, P., Clarke, J., Picard, F., & Ewen, A. (2016). Short-term knee flexion during stair ascent in total knee arthroplasty patients. Poster session presented at British Orthopaedic Research Society, Glasgow, United Kingdom.
Govind, C. ; Komaris, D. ; Riches, P. ; Clarke, J. ; Picard, F. ; Ewen, A. / Short-term knee flexion during stair ascent in total knee arthroplasty patients. Poster session presented at British Orthopaedic Research Society, Glasgow, United Kingdom.
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Govind, C, Komaris, D, Riches, P, Clarke, J, Picard, F & Ewen, A 2016, 'Short-term knee flexion during stair ascent in total knee arthroplasty patients' British Orthopaedic Research Society, Glasgow, United Kingdom, 5/09/16 - 6/09/16, .

Short-term knee flexion during stair ascent in total knee arthroplasty patients. / Govind, C.; Komaris, D.; Riches, P.; Clarke, J.; Picard, F.; Ewen, A.

2016. Poster session presented at British Orthopaedic Research Society, Glasgow, United Kingdom.

Research output: Contribution to conferencePoster

TY - CONF

T1 - Short-term knee flexion during stair ascent in total knee arthroplasty patients

AU - Govind, C.

AU - Komaris, D.

AU - Riches, P.

AU - Clarke, J.

AU - Picard, F.

AU - Ewen, A.

PY - 2016/9/5

Y1 - 2016/9/5

N2 - Stair ascent is a demanding activity which requires around 85° of knee flexion. Analysing this task may give an indication of Total Knee Arthroplasty (TKA) joint function. This study looked at short-term outcomes to give information regarding initial recovery after TKA surgery. Three-dimensional motion analysis was carried out on five healthy control participants and five TKA patients (Columbus®, B. Braun Aesculap, Tuttlingen) performing five stair ascents at their own self-selected pace, choosing whether or not to use handrails. Control data were recorded at one assessment and patient data both pre-operatively and at mean follow up of 10 weeks (8 to 12) post-operatively. The maximum knee flexion achieved during stair ascent was calculated. Four patients walked with a step over step strategy enabling comparison with the control group. There was no change in mean flexion angle from pre-operative to post-operation for either the operated side [mean pre-operatively=84° (76°-94°) vs. 82° (79°-86°) post-operatively , paired t-test p=0.67] or the non-operated side [mean pre-operatively=81° (61°-87°) vs. 81° (70°-95°) postoperatively, paired t-test p=0.56]. This was lower than mean for the control group, 97° (90°-106°) t-test p<0.001. The pre- and post-operative flexion angles of the patient who walked with a step by step strategy was 55° and 56° on the operated side and 43° and 52° on the non-operated side. Knee flexion during stair ascent was similar both pre- and at 10 weeks post operation. Post-operative function did not reach control group values. The large variation between individuals for flexion of the non-operated side may represent different strategies for stair ascent: higher angles to achieve a greater ground clearance for safety, or lower angles to allow the patient to ascend faster so the operated support leg spends less time under load. Further work on a larger number of patients is required to understand this finding.

AB - Stair ascent is a demanding activity which requires around 85° of knee flexion. Analysing this task may give an indication of Total Knee Arthroplasty (TKA) joint function. This study looked at short-term outcomes to give information regarding initial recovery after TKA surgery. Three-dimensional motion analysis was carried out on five healthy control participants and five TKA patients (Columbus®, B. Braun Aesculap, Tuttlingen) performing five stair ascents at their own self-selected pace, choosing whether or not to use handrails. Control data were recorded at one assessment and patient data both pre-operatively and at mean follow up of 10 weeks (8 to 12) post-operatively. The maximum knee flexion achieved during stair ascent was calculated. Four patients walked with a step over step strategy enabling comparison with the control group. There was no change in mean flexion angle from pre-operative to post-operation for either the operated side [mean pre-operatively=84° (76°-94°) vs. 82° (79°-86°) post-operatively , paired t-test p=0.67] or the non-operated side [mean pre-operatively=81° (61°-87°) vs. 81° (70°-95°) postoperatively, paired t-test p=0.56]. This was lower than mean for the control group, 97° (90°-106°) t-test p<0.001. The pre- and post-operative flexion angles of the patient who walked with a step by step strategy was 55° and 56° on the operated side and 43° and 52° on the non-operated side. Knee flexion during stair ascent was similar both pre- and at 10 weeks post operation. Post-operative function did not reach control group values. The large variation between individuals for flexion of the non-operated side may represent different strategies for stair ascent: higher angles to achieve a greater ground clearance for safety, or lower angles to allow the patient to ascend faster so the operated support leg spends less time under load. Further work on a larger number of patients is required to understand this finding.

KW - stair ascent

KW - knee anthroplasty

KW - surgery recovery

KW - post-operative

KW - flexion angles

UR - http://www.borsoc.org.uk/meetings.html

M3 - Poster

ER -

Govind C, Komaris D, Riches P, Clarke J, Picard F, Ewen A. Short-term knee flexion during stair ascent in total knee arthroplasty patients. 2016. Poster session presented at British Orthopaedic Research Society, Glasgow, United Kingdom.