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    Can skin surface pressure under a cast reveal intracompartmental pressure?
    (Springer Verlag, 2000) Uslu, Murad M.; Apan, A
    Although monitoring: intracompartmental pressure (IP) under a cast is very important, it is not possible to measure it in every patient undergoing cast treatment. This study aims to answer the question of whether skin surface pressure (SSP) under a cast can reveal IP. A plaster cast was applied to a sculpted inflatable forearm model with dorsal and volar compartments. SSP under the cast was measured at five different localizations from both dorsal and volar sides of the model and compared to the corresponding IP. In the second experiment, a posterior tibial compartment syndrome model was created in both limbs of five rabbits. Correlation analysis was performed between IP and SSP under the cast. All of the SSP measurements taken from the dorsal and volar side of the sculpted forearm model correlated with IP. Mean correlation coefficient of the measurements was 0.995 (P = 0.000) (SD 0.002, range 0.992-0.999). SSP and IP correlation analysis in the posterior tibial compartment syndrome model of 10 limbs in five rabbits revealed a high correlation. The mean correlation coefficient was 0.973 (P = 0.000) (SD 0.024, range 0.916-0.997). Measuring the pressure between the skin and cast can monitor IP. SSP monitoring can help the physician, patient or parents in the follow-up of patients undergoing cast treatment.
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    The effect of extracorporeal shock wave treatment (ESWT) on bone defects: An experimental study
    (1999) Uslu, Murad M.; Bozdoğan, Önder; Güney, S.; Bilgili, Hasan; Kaya, Ü.; Olcay, B.; Korkusuz, Feza
    The aim of this study was to investigate the effects of extracorporeal shock wave therapy (ESWT) on the formation of callus in bone defects created in rabbit radii. This study searches for an answer to whether ESWT may have a therapeutic effect on bone defects. A bone defect with a radius of 1 cm was created in both forelimbs of 20 rabbits. At the 7th, 14th, and 21st days ESWT treatment was applied to the forming callus in the right radius under fluoroscopic control. At the 6th and 12th weeks, the animals were sacrificed and callus analysis was performed by computerized scan, dual energy x-ray absorptiometer. Histological analyses were also performed. The results revealed that the average callus area in the right (ESWT applied) radial defect was greater in both groups and statistically significant at the 12th week (p < 0.05). There was no difference in bone density between defects. Histologically the callus area was greater on the right side (ESWT applied side) in both groups. However in the first group trabeculae were occupying less space on the right side. Granulation tissue areas and chondroid areas were greater on the right side. We conclude that ESWT has a disorganizing and dispersing rather than a direct osteoinductive effect on forming callus. This effect may play a therapeutic role in bone defects and in situations like callus lengthening where a greater amount of callus is necessary.
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    Histological alterations after irradiation of cartilage using Ho: YAG laser
    (Mary Ann Liebert Inc Publ, 2003) Atik, OS; Erdoğan, Deniz; Ömeroğlu, Suna; Korkusuz, Feza; Uslu, Murad M.; Eksioglu, Fatih
    The authors carried out an experimental study to evaluate the histological alterations after irradiation of cartilage using Holmium:YAG (Ho:YAG) laser VersaPulse Select 60 watts and Infra. Tome Delivery Systems 30degrees Handpiece (spot size at fiber tip 0.4 mm; Coherent Medical, Palo Alto, CA). Background Data: Recently, some authors reported cases with articular cartilage damage following arthroscopic laser surgery in the knee joint for the treatment of articular cartilage or meniscal pathology. Materials and Methods: The cartilage specimens immersed in saline were exposed to Ho:YAG laser irradiation. The laser wavelength was 2.1 mum, and pulse duration was 250 musec. Power settings were 0.2-1 joules per pulse and 10-15 Hz. Total laser energy used in these procedures was 1.5 K joules. During the procedures, the handpiece was used at an angle of 30degrees and at a distance of 1 mm. Results: Electron microscopic evaluation demonstrated that the ultrastructure of the cartilage is preserved in both experiment and control groups. Conclusion: When Ho:YAG laser is used in optimal dosage (optimal joule and Hertz) with optimal technique (keeping the handpiece at an appropriate angle and distance) and avoiding overtreatment, it does not cause cartilage damage.