drop test

When the cerebral hemisphere is damaged, the muscle strength and muscle tension of the contralateral limb are reduced to varying degrees, and the muscle strength and muscle tension of the ipsilateral limb are normal. In the mild and moderate coma patients, the ipsilateral limbs can still maintain a certain muscle tension, while the contralateral side is significantly reduced. When the patient is comatose or the body is not cooperating, the active exercise method cannot be used to check the muscle strength, and the sitting or standing position cannot be taken to check the muscle tension. Using the drop test to check the patient's muscle tone, it can be initially determined whether the coma is caused by cerebrovascular disease. Basic Information Specialist classification: cardiovascular examination classification: neuroelectrophysiology Applicable gender: whether men and women apply fasting: not fasting Tips: The coma patient is absolutely in bed, supine, and turned to the side to avoid vomiting into the trachea. Normal value Both limbs have the same drop speed but are slower. Clinical significance Abnormal result This test is mainly used for the initial screening of coma causes. 1. Cerebrovascular disease coma, the test is positive, the lesion on the contralateral upper limb rapidly falls, the lesion on the ipsilateral upper limb falls slowly, and there is a certain tension after falling. 2. Non-cerebrovascular disease coma, the test was negative, and the upper limbs fell at the same speed but slower. 3. Deep coma of various causes, the test was negative, but the upper limbs fell rapidly at the same time. People who need to be checked Unexplained coma, especially in middle-aged and elderly patients. Precautions Contraindications before the examination: the coma patient is absolutely in bed, supine position, head turned to the side to avoid vomiting into the trachea. Turning over with a low amplitude, gentle operation, the muscles are in a relaxed state, so as to avoid limb muscle contracture, in order to facilitate functional recovery. Requirements for examination: Close observation of changes in the condition: including coma, coma, body temperature, pulse, respiratory and nervous system symptoms, signs, etc. Observe the presence or absence of hemiplegia, neck stiffness and pupil changes. Inspection process The patient is supine, the examiner holds the patient's hands with both hands, or holds the patient's hands with one hand at the same time, raises the same height, and then suddenly releases the hand to observe the patient's hands falling. Not suitable for the crowd Patients with upper limb deformities, severe trauma, and deep coma. Adverse reactions and risks Generally no adverse reactions.