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Öğe Application of adsorptive stripping voltammetry to trace measurements of molybdenum in plant materials(1993) Karakaplan M.; Henze G.A procedure is presented for quantifying molybdenum in dry ashed plant samples. The determination is made by adsorptive stripping voltammetry in the differential pulse mode (DPAdSV). It is based on the adsorptive accumulation of the Mo(VI)?chloranilic acid complex on the surface of a hanging mercury drop, followed by the reduction of the adsorbed complex. Optimal conditions are stirred acidified supporting electrolyte solution (of pH 2–3), containing 10?3 mol/L chloranilic acid and an accumulation potential of ?0.20 V (vs. Ag/AgCl, 3 mol/L KCl). The height of the cathodic stripping peak around ?0.60 V depends linearly on the molybdenum concentration and accumulation time (over the ranges 0–12 ng/ml and 0–300 seconds, respectively). For an accumulation period of 5 minutes, the detection limit is 0.02 ng/ml. Possible interferences by other trace metals are investigated. The proposed procedure has been applied to the determination of molybdenum traces in a variety of plants with good accuracy and precision. The results are in good agreement with those obtained by atomic absorption spectrometry. Copyright © 1993 VCH Publishers, Inc.Öğe Common Peroneal Nerve Injury Caused by a Wild Boar Attack(2024) Köroğlu M.; Özdeş H.U.; Acet Ö.; Sarıbas T.; Ergen E.; Karakaplan M.; Aslantürk O.Wild boar-inflicted nerve injuries have been very rarely reported in the literature. A 62-year-old man was attacked by a wild boar in eastern Turkey and brought to the emergency department. He had 5 lacerations on the lower extremities and 2 on the posterior thoracic region. In addition to soft tissue lacerations, he sustained a complete laceration of the left common peroneal nerve with a foot drop. The common peroneal nerve was repaired primarily the day after the attack. The patient was discharged after a short hospital stay without any immediate complications; however, at the 10-mo follow-up, he still had a left foot drop.Öğe The effect of continuous passive motion after repair of Achilles tendon ruptures: an experimental study in rabbits(2002) Ertem K.; Elmali N.; Kaygusuz M.A.; Inan M.; Ayan I.; Güner G.; Karakaplan M.OBJECTIVES: The effect of continuous early passive motion on morphologic and histologic healing following repair of Achilles tendon rupture was evaluated in comparison with cast immobilization. METHODS: Achilles tendons of 20 adult rabbits were repaired with the use of modified Kessler technique after surgical transection. Throughout the postoperative six weeks, the rabbits were randomly assigned to cast immobilization (n=10) and to continuous early passive motion four hours a day (n=10). All the rabbits were sacrificed at the end of six weeks and their tendon tissues were removed for macroscopic and histologic examinations. RESULTS: On macroscopic evaluation, findings on adhesions at the operation site, periarticular atrophy, and the ROM of the ankle joint were found significantly more favorable with continuous early passive motion than those of the control group (p<0.001, p<0.05, and p<0.001, respectively). On histologic evaluation, regular collagen bundle alignment was 70% and 20% in the study and control groups, respectively (p<0.05), whereas findings on hyalinization and inflammatory infiltration were not significantly different. CONCLUSION: The utilization of continuous controlled passive motion following repair of Achilles tendon rupture was shown to have beneficial effects on tendon healing and ankle range of movement, without leading to eventual ruptures.Öğe The medial approach for arthroscopic-assisted fixation of lateral tibial plateau fractures(SAGE Publications Ltd, 2014) Elmali N.; Baysal Ö.; Karakaplan M.; Gülabi D.; Sağlam F.Objectives: Tibial plateau fractures are complex injuries involving the weight bearing surface of the tibia. Open reduction and internal fixation with plates and screws is an established method of treatment for complex fractures (Schatzker types V–VI). Arthroscopically assisted techniques have been used successfully for simple fractures (Schatzker types I–III). Historically, arthroscopic-assisted reduction for lateral tibial plateau fractures have been performed through a laterally based metaphyseal window. We found this technique to have several limitations, including bone grafting through a short subchondral tunnel. Also, there was a risk of lateral vascular supply distrubtion. We proposed that medial window approach technique would provide a longer tunnel for subchondral support and aid in fracture reduction. We aimed to present our initial experiences in first seven cases approaching lateral tibial plateau fractures through a medial metaphyseal window. Methods: Our series involves 7 patients with 5 Schatzker type II and 2 Schatzker type III lateral tibial plateau fractures treated by a single surgeon, using a medial approach for the arthroscopic assisted fixation. There were 5 males and 2 females. The average age at the time of surgery was 34.2 years, (29-52). All of the patients underwent plain radiography and CT scanning in each knee Time from injury to surgery was 7.2 days (4-12 days). Length of follow up was 9 months (6-22 months). There was 2 lateral meniscus tear that treated with partial meniscectomy and 1 MCL injury that treated conservativeely. Surgery was performed in four steps. First step was diagnostic arthroscopy of the injured knee,, second step was reduction of the fracture using a sylindiric tube with fluoroscopic guidance, third step was the arthroscopic verification of the fracture reduction, and finally percutaneous osteosynthesis of the fracture.Care is taken to keep the flow to gravity or, if using a pressure controlled pump, to set the pressure at approximately 40 millimeters of mercury. This will help alleviate the risk of compartment syndrome. Compartment firmness should be continuously monitored throughout the procedure. Results: No complications related to the procedure were observed. All patients reported a relevant reduction in pain, were able to mobilize with full weight bearing in the average 12 weeks (9–15 weeks). No secondary loss of reduction was observed in radiological controls; No revision surgery was required. Functional assessment according to HSS (hospital for special surgery) of the patients were excellent in 5 cases, good in 2 cases. Conclusion: Because depressed fragments are elevated from distal cortical windows, the importance of an intact, or easily restored, “cortical envelope” is paramount. In most Schatzker Type II and III fractures, the cortical envelope is either intact or can easily be restored with a clamp. The main advantage of medial approach for these fracture patterns is the creation of a long tunnel for subchondral support, the ease of fracture reduction and saving the lateral vascular supply. © The Author(s) 2014.Öğe Transtibial aperfix system in reconstruction of ACL injuries: Radiological and clinical two year follow-up results(SAGE Publications Ltd, 2014) Görmeli G.; Görmeli C.A.; Karakaplan M.; Korkmaz M.F.; Diliçıkık U.; Gözükara H.Objectives: The aim of this this study was to assess the clinical outcomes and fixation durability of the AperFix (Cayenne Madical, Scottsdale, Arizona) system and to determine the effect of patient’s age in arthroscopic reconstruction of the anterior cruciate ligament. Methods: Patients with symphtomatic anterior cruciat ligament rupture underwent arthroscopic reconstruction. Patients were evaluated in terms of range of motion values; Lysholm, Cincinati and Tegner activity scales; laxity testing and complications. Tunnel widening was assessed by AP and lateral radiographs. Early postoperative and last follow-up radiographs were compared. Results: Fifty-one patients were evaluated at a 29 months (range: 25-34 months) follow-up. Mean age at the surgery was 26.5 ± 7.2 years. Lysholm, Cincinati and Tegner activity scales were significantly higher from preop scores. (Lysholm scores: preop: 51.4 ± 17.2 postop: 88.6 ± 7.7 (p<0.001); Tegner activity scores: preop 3.3 ± 1.38 postop: 5,3 ± 1,6 (p<0,001); Cincinati scores: preop: 44.3±17 postop:81,3 ± 13.9 (p<0.001)). There was no significant difference for knee score, range of motion deficits and femoral tunnel enlargement of the patients with below and above 30 years. Conclusion: According to our results with <30 years and above >30 years patient comparison we think that patient’s age is less important than activity level for the surgical treatment decision. The AperFix system performed satisfactory clinical and radiological results with low complication rate. But long-term clinical and radiological results are needed to decide the ideal ACL reconcstruction method. © The Author(s) 2014.
