SUMMARY OBJECTIVE: Postoperative bleeding is one of the most important factors affecting clinical and functional results in total knee arthroplasty. Therefore, many studies have been conducted on bleeding in arthroplasty patients. However, there are very few reports investigating the effect of patellar surface replacement on bleeding in knee arthroplasty. We, therefore, aimed to investigate the effect of patellar surface replacement on postoperative bleeding. METHODS: In this retrospective study, 30 with patellar resurfacing were compared with 39 without patellar resurfacing among patients who had undergone total knee replacement due to primary osteoarthritis. Demographic data, amount of transfusion, preoperative and postoperative hemoglobin and hematocrit values, and total, visible, and hidden blood loss values were recorded. RESULTS: No statistical difference was found between the two groups in terms of demographic values. There was no significant difference between the groups in terms of the amount of blood in the drain, total blood loss, hidden blood loss, and blood transfusion in patients who had and had not undergone patellar resurfacing. A positive significant correlation was found between postoperative drainage volume and total blood loss. CONCLUSION: Patellar component application in patients who had undergone total knee arthroplasty does not change the blood loss of the patients.

RESUMO Objetivo: A fibrose epidural é uma das principais razões que motiva intervenções cirúrgicas repetidas. O objetivo deste estudo foi comparar o efeito do plasma rico em plaquetas (PRP) no desenvolvimento de fibrose epidural com matriz de colágeno e enxerto de gordura autógena. Métodos: Ratos machos foram separados em 3 grupos. A laminectomia foi aplicada nos ratos e gordura epidural foi colocada no primeiro grupo (n = 7); matriz de colágeno de tamanho igual foi aplicada no segundo grupo (n = 7); uma dose única de PRP foi aplicada no terceiro grupo (n = 7). Resultados: A fibrose epidural foi mais comum no grupo em que a matriz de colágeno foi aplicada, quando comparada aos animais do grupo PRP. O grupo PRP apresentou os melhores valores na prevenção da fibrose epidural quando comparado ao grupo enxerto de gordura, porém a diferença não foi estatisticamente significante. Conclusão: PRP é um material de fácil obtenção do sangue dos pacientes e a baixo custo; a principal relevância clínica de nosso estudo é que o PRP pode ser um material eficiente para obter melhores resultados clínicos após a laminectomia devido à sua cicatrização tecidual e potencial de prevenção de fibrose epidural. Nível de evidência V, Pesquisa com animais.

ABSTRACT Objective: Epidural fibrosis is one of the main reasons for requiring repeated surgical intervention. Our objective was to compare the effect of Platelet Rich Plasma (PRP) on the development of epidural fibrosis with collagen dural matrix and free autogenous fat graft. Methods: Male rats were separated into 3 groups. Laminectomy was implemented on the rats and epidural fat pad was placed in the first group (n = 7); equal size of collagen dural matrix was applied in the second group (n = 7); a single dose of PRP was applied in the third group (n = 7). Results: Epidural fibrosis was more common in the group that collagen dural matrix was applied when compared the ones that PRP was applied. PRP group presented better values in preventing epidural fibrosis when compared to the fat pad group, however this difference was not statistically significant. Conclusion: PRP is a material that can be easily obtained from the very blood of patients and at an extremely low cost; the main clinical relevance of our study is that the PRP might be an efficient material for better clinical results after laminectomy surgery due to its tissue healing and epidural fibroris preventing potentials. Level of Evidence V, Animal research.

ABSTRACT Objective: To determine the outcomes after combined inside-out and all-inside repair technique of bucket-handle meniscus tears. Methods: A retrospective review was made of patients with bucket-handle meniscus tears repaired with combined techniques, using the all-inside technique in posterior meniscal tears and the inside-out technique in the middle part of the meniscal tears. Meniscal healing was assessed clinically using Barrett's criteria and MRI. Results: The study comprised 52 patients with a mean age of 28.4 years old (range, 19-52 years old). The mean follow-up period was 31.3 months (range, 24-59 months). Two patients had ACL re-rupture, and complete meniscal healing was achieved in all but one patient. Although improved from preoperative status, Tegner and Lysholm scores were lower in the ACL reconstructed patients than in the intact ACL patients. Conclusion: Combined inside-out and all-inside meniscal repair technique is a successful and cost-effective treatment method in bucket-handle meniscus tears. Level of Evidence IV, Therapeutic Study.