TKR: Tourniquet use increases pain and reduces range of motion .
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Isto permite o reconhecimento precoce de investigação clinicamente significativa e ajuda os leitores a concentrarem-se nos artigos com maior probabilidade de moldar a prática futura.
OrthoEvidence Journal (OE Journal) - ACE Report
OE Journal. 2013;1(11):53 Acta Orthop. 2012 Oct;83(5):499-503. doi: 10.3109/17453674.2012.727078. Epub 2012 Sep 14.50 patients undergoing total knee arthroplasty were included in this trial to determine the effect of tourniquet use on implant migration. Patients were randomized to undergo cemented total knee arthroplasty with or without the use of a tourniquet. The results of this study indicate that the use of a tourniquet did not reduce implant migration, caused more postoperative pain, and reduced range of motion.
Was the allocation sequence adequately generated?
Was allocation adequately concealed?
Blinding Treatment Providers: Was knowledge of the allocated interventions adequately prevented?
Blinding Outcome Assessors: Was knowledge of the allocated interventions adequately prevented?
Blinding Patients: Was knowledge of the allocated interventions adequately prevented?
Was loss to follow-up (missing outcome data) infrequent?
Are reports of the study free of suggestion of selective outcome reporting?
Were outcomes objective, patient-important and assessed in a manner to limit bias (ie. duplicate assessors, Independent assessors)?
Was the sample size sufficiently large to assure a balance of prognosis and sufficiently large number of outcome events?
Was investigator expertise/experience with both treatment and control techniques likely the same (ie.were criteria for surgeon participation/expertise provided)?
Sim = 1
Incerto = 0,5
Não relevante = 0
Não = 0
A Avaliação dos Critérios de Relato avalia a transparência com que os autores relatam as caraterísticas metodológicas e do ensaio na publicação. A avaliação está dividida em cinco categorias que são apresentadas de seguida.
3/4
Aleatorización
3/4
Medición de resultados
3/4
Inclusión / exclusión
4/4
Descripción de la terapia
4/4
Estadísticas
Detsky AS, Naylor CD, O'Rourke K, McGeer AJ, L'Abbé KA. J Clin Epidemiol. 1992;45:255-65
O Índice de Fragilidade é uma ferramenta que auxilia na interpretação de achados significativos, fornecendo uma medida de força para um resultado. O Índice de Fragilidade representa o número de eventos consecutivos que precisam de ser adicionados a um resultado dicotómico para que o resultado deixe de ser significativo. Um número pequeno representa um resultado mais fraco e um número grande representa um resultado mais forte.
Porque é que este estudo era necessário agora?
Tourniquets are routinely used during total knee replacement to reduce bleeding which might impair fixation of the cemented prosthesis. However, tourniquet use is associated with re-perfusion trauma, oxidative stress, deep vein thrombosis risk, and injury due to pressure on skin, muscles, nerves, and arteriosclerotic vessels. Tourniquets may also reduce the surgical field, which may lead to a number of other complications and jeopardize the sterility of the postoperative dressing. This study aimed to determine the effects of tourniquet use on patients undergoing cemented total knee arthroplasty.
Qual era a principal questão de investigação?
Does tourniquet use reduce postoperative migration and improve clinical outcomes in patients, 2 years after undergoing cemented total knee arthroplasty?
- The difference in migration, between the patients who received a tourniquet and the patients who did not, was not significant: 0.01 mm (95% CI: -0.13 to 0.15).
- The patients who received a tourniquet experienced significantly more pain during the first 4 postoperative days than the patients who did not receive and tourniquet (49 mm versus 41 mm; p=0.01).
- Tourniquet use significantly reduced total overt bleeding when compared to no tourniquet use (317 mL versus 615 mL; p=0.002), but did not significantly reduce the total bleeding estimated by hemoglobin dilution (1184 mL versus 1236 mL).
- There was no significant difference in morphine consumption between the patients who received a tourniquet and the patients who did not receive a tourniquet.
- The mean range of motion at 2 years for the patients in the tourniquet group was 113 degrees, whereas the mean range of motion for the patients in the control group was 124 degrees (p=0.001).
De que é que me devo lembrar mais?
Tourniquet use did not significantly alter migration of the cemented total knee arthroplasty and may cause significantly more postoperative pain and reduce range of motion when compared to no tourniquet use.
Como é que isto afectará o tratamento dos meus doentes?
It is still unclear if tourniquet use during total knee arthroplasty is efficacious. Although its use can reduce operative blood loss, it may effect implant fixation/migration, postoperative pain and range of motion. Further randomized trials are needed to determine if tourniquet use has any effect on implant fixation and migration, and if any differences detected have a clinically significant impact on long-term outcomes.
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