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Öğe External fixation versus hemiartroplasty in unstable intertrochanteric hip fractures of the elderly(Acta Medica Belgica, 2017) Polat, Metin; Arslan, Aydin; Utkan, AliTo compare two alternative methods : external fixation (EF) and hemiarthroplasty (HA) in elderly patients with unstable intertrochanteric hip fractures. Forty-two patients with Orthopaedic Trauma Association type 31A2-2 or 31A2-3 fractures treated between January 2007 and December 2010 were included. Twenty-two patients underwent hemiarthroplasty and twenty patients underwent external fixation. The mean length of stay in the operation room was 45 minutes and 108 minutes in the EF and HA groups, respectively (p< 0.05). The mean postoperative length of hospital stay was 2.7 days in the EF group and 4.9 days in the HA group (p< 0.05). The total length of hospital stay, functional scores and mortality rates were not different. Findings of the current study comparing EF and HA in a limited number of non-randomized elderly patients with unstable intertrochanteric fracture indicated that the EF method, when performed in a sufficiently stable manner, might be a valuable alternative to HA since it is less aggressive and cheaper.Öğe The Relationship between the Isocapnic Buffering Phase and Ventilatory Threshold in Endurance Athletes and Team Sport Athletes during an Incremental Exercise Test(Asian Exercise and Sport Science Association, 2018-05-02) Korkmaz Eryılmaz, Selcen; Polat, Metin; Soyal, Mehmet; Aydoğan, SamiBackground. There is sparse literature examining the ICB phase of aerobic- and anaerobic-trained athletes. Measurements of ICB phase values of athletes can help to evaluate the sport’s physiological demands and understand the physiological adaptations in response to physical training. Objectives. The purpose of this study was to examine the relationship between the isocapnic buffering (ICB) phase and the maximal oxygen uptake (VO2max) as well as the ventilatory threshold (VT) in trained athletes. Methods. Twenty-eight male endurance athletes and forty male team sports athletes underwent an incremental treadmill test to determine their VT, respiratory compensation point (RCP), and VO2max. The ICB phase was calculated as the difference in Oxygen uptake (VO2) between the RCP and VT and expressed in either absolute or relative values. Results. The VO2max, maximal running speed, time to exhaustion, VO2 at the VT and RCP, running speed at the VT, and VT expressed as % VO2max was higher in the endurance athletes than in the team sport athletes (p < 0.01), whereas the RCP expressed as % VO2max and running speed at the RCP showed similar values in both groups (p > 0.05). Both the absolute and relative ICB phase values were found to be significantly higher in team sports athletes than in endurance athletes (p < 0.001). The relative ICB phase was significantly negatively correlated with the VO2max (– r = 0.517, p < 0.001), the VO2 at the VT (– r = 0.755, p < 0.001), and the VO2 at the RCP (r = – 0.517, p = 0.001). Conclusion. The current findings suggest that, for trained athletes, the magnitude of the ICB phase is more closely related to the VT rather than the VO2max and RCP. Presumably, the high-intensity intermittent-type exercises performed by team sports athletes may have improved their buffering capacity, leading to a shift in the RCP without a change in the VT, and consequently enhancing the ICB phase.Öğe Topical co-delivery of platelet rich fibrin and tranexamic acid does not decrease blood loss in primary total knee arthroplasty compared to the standard of care: a prospective, randomized, controlled trial(SPRINGER, ONE NEW YORK PLAZA, SUITE 4600 , NEW YORK, NY 10004, UNITED STATES, 2021) Tandoğan, Reha Nevzat; Polat, Metin; Beyzadeoğlu, Tahsin; Karabulut, Erdem; Yıldırım, Kerem; Kayaalp, AsımPurpose The purpose of this study was to evaluate the efcacy of intra-operative co-administration of tranexamic acid (TA) and platelet rich fbrin (PRF) using a proprietary co-delivery system on the amount of blood loss, early functional outcomes and wound complications after primary total knee arthroplasty (TKA). The intervention was compared to the standard of care (combined intravenous & topical TA) in a prospective, randomized, blinded setting. Methods 80 patients undergoing primary cemented TKA without tourniquet were prospectively randomized into control (combined intravenous and topical TA) and PRF (intra-venous TA and co-delivery of topical PRF and TA) groups after informed consent. Total blood loss, drainage blood loss, knee range of motion, VAS pain scores, length of stay and wound complications were analysed. Data collection was performed in a double blind manner on days 1, 3 and 21. Results There was no statistically signifcant diference in drainage blood loss (550 ml vs. 525 ml, p=0.643), calculated total blood loss on day 1 (401 ml vs. 407 ml, p=0.722), day 3 (467 ml vs 471 ml, p=0.471) and day 21 (265 ml vs. 219 ml, p=0.082) between the PRF and control groups respectively. The PRF group had a small but statistically signifcant increase in median knee extension in the early post-operative period, however this diference evened out at 3 weeks. No signifcant diference could be demonstrated between the PRF and control groups in length of stay, VAS pain scores, narcotic usage, wound complications and knee fexion at all time points. Conclusions The topical co-delivery of PRF and TA does not signifcantly decrease blood loss in primary TKA compared to the standard of care. Slightly better active knee extension in the frst 3 postoperative days can be achieved, however this beneft is not clinically relevant. Level of evidence I, Therapeutic study.