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Biomedical subjects

Mustafa Karahan

Publications and source records attributed to Mustafa Karahan.

9 recordsLinked to original sources
PubMed2006

[Primary surgical repair with the Krackow technique combined with plantaris tendon augmentation in the treatment of acute Achilles tendon ruptures].

OBJECTIVES: We evaluated the long-term results of acute Achilles tendon ruptures treated with primary end-to-end repair with the Krackow technique combined with augmentation using the plantaris tendon. METHODS: Thirty-six patients (31 males, 5 females; mean age 34 years; range 21 to 42 years) underwent primary surgical repair for acute Achilles tendon ruptures. Most of the patients (31/36) were involved in regular sportive activities. Surgery included end-to-end repair with the Krackow technique (locking-loop) combined with plantaris tendon augmentation. All the patients received a standardized progressive postoperative rehabilitation program. The results were evaluated with respect to time to return to work and preinjury activity levels and by a scoring system covering objective and subjective parameters. The mean follow-up was 54 months (range 28 to 78 months). RESULTS: At surgery, 34 patients (94.4%) and two patients (5.6%) were found to have complete and partial ruptures, respectively. The mean operation time was 50 minutes (range 40 to 70 minutes). The patients returned to work after a mean of eight weeks (range 6 to 9 weeks) and to preinjury sportive activities after a mean of 17 weeks (range 14 to 20 weeks). The overall mean scoring was good (88 out of 100) at the end of a year follow-up. Early or late complications included superficial wound infections in five patients and partial rupture recurrence in one patient. CONCLUSION: Our results showed that the Krackow technique combined with plantaris tendon augmentation and a rehabilitation protocol aiming early motion enabled physiological tendon healing.

Achilles Tendon↗
PubMed2005

Effect of drain placed in the donor site in the early postoperative period after arthroscopically assisted anterior cruciate ligament reconstruction with quadrupled hamstring tendons.

BACKGROUND: No scientific study has addressed the effects of the routine use of postoperative drains in the donor site after arthroscopic anterior cruciate ligament reconstruction using hamstring tendons. HYPOTHESIS: Patients who have drains placed in their donor sites have less lower extremity edema, more motion, and more comfort in the early postoperative period. STUDY DESIGN: Randomized controlled clinical trial; Level of evidence, 1. METHODS: Thirty-four patients undergoing arthroscopically assisted quadruple hamstring tendon anterior cruciate ligament reconstruction were randomly assigned to either receive a drain for 24 hours placed at the donor site (17 patients) or have no drain at the donor site (17 patients). Data were collected on postoperative days 1, 3, 5, and 7 regarding knee flexion, knee extension, thigh circumference, leg circumference, and visual analog scale (measuring pain). RESULTS: In the study group versus the control group, there were increased knee flexion measurements on postoperative day 7 (84 degrees vs 69 degrees , P < .05); smaller thigh circumference measurements on postoperative day 7 (36.8 vs 40.1 cm, P < .05); smaller leg circumference measurements on postoperative days 3 (33.2 vs 36.4 cm, P < .05), 5 (32.7 vs 36.0 cm, P < .05), and 7 (31.8 vs 35.7 cm, P < .001); and a lower visual analog scale score on postoperative days 3 (40.38 vs 57.50, P = .001), 5 (38.46 vs 60.35, P = .001), and 7 (38.07 vs 61.43, P = .001). CONCLUSION: Drain placement at the donor site after anterior cruciate ligament reconstruction gives more comfort to the patient and provides better flexion within the first week.

Adolescent↗
PubMed2005

Evaluation of the neurosensory function of the medial meniscus in humans.

PURPOSE: Menisci are known to have receptors mainly concentrated at the anterior and posterior horns. Although they are purported to send afferent impulses to the central nervous system, this function has not been thoroughly evaluated. The purpose of the study was to investigate whether stimulation of the menisci initiates a cortical response. The reaction of the end organ to the reflex arc is also evaluated. TYPE OF STUDY: Prospective case series. METHODS: Fourteen patients with normal medial menisci were included in the study. Different parts of the knee joint (the posterior horn and the body of the medial meniscus, the medial femoral condyle, the capsule, and the joint space) were electrically stimulated by a probe during arthroscopy. The cortical response was monitored with somatosensory-evoked potentials (SEPs). The compound muscle action potentials (CMAPs) of the semimembranosus, quadriceps, and biceps femoris muscles were also monitored with electroneuromyography (ENMG). RESULTS: Among the stimulated parts, only the posterior horn of the meniscus produced cortical responses. No response was obtained with stimulation of the medial femoral condyle, the body of the medial meniscus, the capsule, or the joint space. Stimulation of the posterior horn of the medial meniscus produced a measurable amount of CMAP latency for the semimembranosus muscle, but not for the quadriceps and biceps femoris muscles. CONCLUSIONS: Stimulation of the posterior horn of the medial meniscus produces reproducible cortical SEPs and results in ENMG-verified response of the semimembranosus muscle where no response of the semimembranosus muscle is detected with stimulation of the other parts of the knee. CLINICAL RELEVANCE: The knowledge that only the horns of the medial meniscus have mechanoreceptors in the medial compartment of the knee helps to understand patients' signs and symptoms in medial compartment disease.

Action Potentials↗
PubMed2005

[Chronic dislocations of the shoulder].

Diagnosis and management of chronic dislocations of the glenohumeral joint remain challenging. These dislocations usually occur in debilitated patients with a poor bone quality and they often have a decreased rehabilitation potential. Treatment can only be successful with early recognition of the condition, careful patient selection, and implementation of appropriate surgical techniques. This article reviews current information on clinical evaluation, preoperative radiologic investigations, and treatment strategies in patients with chronic dislocations of the glenohumeral joint and associated articular surface defects.

Chronic Disease↗
PubMed2005

[Lesions of the superior labrum anterior-posterior and biceps tendon].

Biomechanical studies have shown that the biceps tendon and the superior labrum have significant contributions to the glenohumeral stability. Since superior labrum anterior-posterior (SLAP) lesions pose diagnostic difficulties, they should be kept in mind when evaluating a painful shoulder. Although magnetic resonance arthrography is of great use in diagnostic studies, diagnostic arthroscopy is still the best method for these lesions. Treatment may vary depending on the type of the lesion. As our knowledge about the glenohumeral anatomy enhances, success rates of the arthroscopic treatment of SLAP lesions will increase.

Arthrography↗
PubMed2005

[Shoulder instability in athletes: principles of diagnosis and treatment].

Shoulder complaints are one of the leading reasons for a doctor's visit in athletes involved in overhead activities, and among them, dislocation and subluxation are very frequent clinical presentations. Although diagnosis and management of shoulder problems are more clear-cut in traumatic cases, atraumatic cases may be quite troublesome. In order to facilitate the interval between the presentation of complaints and institution of appropriate treatment, many issues should be appreciated including the anatomy, etiology, pathogenesis, clinical evaluation, and treatment of shoulder disorders. This review aims to outline the current approach to shoulder problems arising from instability in the light of the most recent literature.

Athletic Injuries↗
PubMed2004

[Muscle and tendon injuries in children and adolescents].

The pediatric athlete with open physeal plates is more susceptible to growth plate injuries and avulsion fractures than to ligament and muscle-tendon injuries that most often occur in adults. Muscle contusions and strains are common injuries in young athletes. Although they are rare in the early and middle stages of childhood, they become quite common during the growth spurt period. Healing of muscle tissues is much more rapid in children than that in adults, but it must be ensured that full motion and full strength are regained before returning to sports activities, because recurrences of injuries may result in more serious complications such as myositis ossificans. On the other hand, acute tendinous injuries are quite rare in children; however, repetitive submaximal stress may lead to overuse syndromes. This article reviews the basic anatomy and function of skeletal muscle and discusses the physiopathology of muscle-tendon injuries, and the methods of treatment and prevention, with particular focus on the growing child.

Adolescent↗