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Kamal Ibrahim

Publications and source records attributed to Kamal Ibrahim.

2 recordsLinked to original sources
PubMed2002

A reliable and accurate method for measuring orthosis wearing time.

STUDY DESIGN: Compliance monitor measurement of orthosis wearing time during laboratory climate tests and normal volunteer subject tests were compared to normal diaries. OBJECTIVE: To develop and test the accuracy and reliability of a device designed to measure spinal orthosis wearing time. SUMMARY OF BACKGROUND DATA: Orthosis wearing time is an important factor in orthotic treatment for spine disorders. A reliable and objective method for measuring orthosis wearing time currently is lacking. METHODS: Four pressure switches and a data logger embedded in each thoracolumbosacral orthosis recorded orthosis wearing time. Orthoses were assumed to be worn when at least two switches were "on." Laboratory climate tests and normal volunteer tests were conducted to assess the ability of the compliance monitor to measure orthosis wearing time. A manual wearing-event diary was kept during all the tests. The length of each wearing-time interval, the daily wearing time, and the cumulative wearing time were calculated from data recorded by the compliance monitor and the manual diaries. RESULTS: A linear regression was performed on all orthosis wearing-time intervals as recorded by the compliance monitor and by the manual diaries. Climate chamber tests yielded 121 sensor trigger-event intervals (R2 = 0.998; slope = 1.003; P < 0.0001). Normal subject testing yielded 72 orthosis wearing-time intervals (R2 = 0.998; slope = 0.998; P < 0.0001). CONCLUSION: As indicated by the regression analyses, the compliance monitor accurately quantified the orthosis wearing-time intervals during the laboratory climate tests and the tests with normal volunteers.

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PubMed2002

Prothrombin activation in eastern tiger snake bite.

AIMS: To perform ex vivo studies in eastern tiger snake envenomation which define the haemostatic events associated with prothrombin activation. METHOD: Serial studies were performed on plasma from six individuals with evidence of eastern tiger snake envenomation. These analyses were particularly directed to fibrinogen levels, F1 + 2, TAT and evidence of fibrinolysis. RESULTS: There was a substantial rise in F1 + 2 and thrombin-antithrombin (TAT) complexes in all cases, even with minimal evenomation. In some cases the molar ratio of F1 + 2 and TAT was reduced from the relationship normally seen in vitro and ex vivo in clinical thrombosis. There was a dramatic fall in factor V and VIII levels which occurred 4-6 hours before the decline in prothrombin and AT3. This related in time to a fall in alpha2AP and plasminogen. Protein C levels also declined dramatically but many hours after presentation. CONCLUSIONS: F1 + 2 and TAT are sensitive markers of tiger snake evenomation. In some patients with massive prothrombin activation, the common mechanism for TAT clearance may be altered or overwhelmed. Conversely, the renal clearance of the smaller F1 + 2 may be enhanced. In the absence of thrombocytopaenia, which is a very sensitive marker of DIC, the fall in labile factors with tiger snake envenomation is significantly contributed to by proteolytic digestion of clotting factors.

Adolescent↗