[ADHD/autism, driver's licence and physician's responsibility].
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This is a report of results of a driver training program for a selected group of disabled individuals at the Long Beach Veterans Administration Medical Center. A total of 167 eligible candidates elected to enter our driver training program, of whom 154 (92%) were successful. Dropouts were the result of educational deficiencies, physical inability, and/or stress in performance ability.
Driving motor vehicles is a complex visuomotor task that challenges normal nervous system functioning. Indemnity of sensory organs and intact alertness are essential. In addition, safe driving is extremely sensitive to disturbances of attention as well as to some forms of cortical dysfunction. Epilepsy, cognitive impairment, Parkinson's disease, stroke and sleep disorders, among other conditions, may interfere with driving through different mechanisms. The individual rights to maintain important privileges such as having a driver's license may enter in conflict with a society demanding safer regulations. Current trends favor more liberal restrictions and may provide specific limits on an individual basis to patients with impairments caused by neurological diseases. So far, there is no information on the consequences in terms of rate of accidents following newly introduced changes in driver license regulations for neurological patients.
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Two groups of 12 outpatients each (six men and six women) with generalized anxiety disorder, participated in this study. Each patient was treated single-blind with placebo during the first 7 days (baseline), followed by a double-blind drug treatment period of 4 consecutive weeks (active) and ending again with 7 days single-blind placebo treatment (washout). One group received buspirone 5 mg three times a day in the first week and continued with 10 mg in the morning, 5 mg in the afternoon, and 5 mg in the evening during the second, third, and fourth weeks. The other group received diazepam 5 mg three times a day in all 4 weeks. On the evening of the seventh day of each treatment week the Hamilton Rating Scale for Anxiety and the Symptom Check List (90 items) were applied to assess the therapeutic effects, followed by an on-the-road driving test that started 1.5 hours after the last drug or placebo intake. The test consisted of operating an instrumented vehicle over a 100 kilometer highway circuit while attempting to maintain a constant speed and a steady lateral position within the right traffic lane. Two patients in the diazepam group were unable to complete their test after the first and second treatment week, respectively, because of serious sedative reactions. Both buspirone and diazepam were equally effective in reducing overall anxiety symptoms. The specific profiles showed that buspirone also reduced concomitant depressive symptoms and symptoms of interpersonal sensitivity and anger-hostility. In contrast, diazepam was found to be slightly more effective in reducing somatic symptoms and to positively affect sleep disturbances. Moreover, abrupt discontinuation of diazepam resulted in a relapse of psychic anxiety symptoms comparable with the placebo-baseline level and a partial relapse of somatic anxiety symptoms. Chronic treatment with buspirone had no significant effects on lateral position and speed control. In contrast, diazepam significantly impaired control of lateral position in the first 3 weeks of treatment. There was no significant impairment in the fourth treatment week and the placebo-washout week. Speed control was significantly impaired only in the first week. The relevance of the trend toward decreasing performance impairment during chronic treatment remains to be established.
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Driving requires several different sets of abilities, the interaction of which is complex. The combination of these factors, rather than any single factor alone, may make it inadvisable to issue a driver's license. Although vision is the predominant source of information for the driver, visual abilities are only one of the factors to be considered when judging the overall driving ability of an applicant. The final determination can only be made through on-the-road evaluation and cannot be based on the evaluation of vision alone. Individual evaluations should include a review of the past driving record and of nonvisual driving-related abilities, as well as observation of on-the-road performance by a qualified driving instructor or driving evaluator.
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Most articles on elder drivers offer either general advice, or review testing protocols that divide drivers into two distinct groups: safe or unsafe. We believe it is unreasonable to expect any testing to fully separate drivers into just these two mutually exclusive groups, so we offer a protocol for a more practical approach. This protocol can be applied by primary care physicians. We review the justification for the many steps of this protocol, which have branches that lead to identifying drivers as low risk, high risk (for accidents) or needing further evaluation. Options for further evaluation are provided.
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BACKGROUND: The Finnmark Stroke Register is an investigation of new cases of stroke in a Norwegian county between April 1998 and March 2002; 622 were first attacks. The aim of this study was to estimate how physicians deal with driving issues in these patients in the sub-acute stage and during the first year after the stroke. MATERIAL AND METHODS: Evaluations of fitness to drive were made by the author and research nurses in the sub-acute stage and through telephone interviews after three and twelve months. RESULTS: 45% of first attack survivors had a valid driving licence. Usually the medical records contained no information concerning the license; this information was obtained during the follow up. 80% of patients with a licence did not fulfill the requirements for driving in the sub-acute stage because of neurological, cognitive or ophthalmologic impairment. Less than half of these patients were told not to drive. Many of the others went on driving. One year later, about 40% of patients with a valid license did not fulfill the requirements for driving. Several cases of homonymous hemianopia escaped detection for a long time. INTERPRETATION: Physicians should note the possession of a driving licence in the medical records. If indicated, acute stroke patients should receive temporary verbal and written information not to drive. Special concern ought to be given to visual disturbances. Uniform standards concerning fitness to drive ought to be developed in Norway.
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