arterial patency test

The arterial patency test is an auxiliary test used to check that the arteries are normal. The blood of the hand is supplied by the two arteries of the ulnar artery and the radial artery, and there is a rich anastomosis between the two, so that when one of the arteries is occluded, the blood supply to the hand can still be ensured. In this test, after blocking the radial artery, the color change of the skin of the hand was observed to determine whether the blood flow of the ulnar artery was unobstructed. The corresponding symptoms can be judged by the above method examination. Basic Information Specialist Category: Cardiovascular Examination Category: Other Examinations Applicable gender: whether men and women apply fasting: not fasting Analysis results: Below normal: Normal value: no Above normal: negative: After the upper limbs were placed at the level of the heart, the time from the pale to the flushing of the palm skin was negative for 30 s. Positive: After the upper limbs were placed at the level of the heart, the time from the pale to the flushing of the palm skin was positive for >30s. 1. The ulnar artery is completely obstructed, and the test is positive. If the brachial artery is continuously compressed, the palm of the hand will continue to be pale, and the pressure will be changed to become flushed. 2. Incomplete ulnar artery occlusion, positive test. In the case of continuous compression of the brachial artery, the time from palm to pale flushing may be extended to varying degrees. 3. Obstructive lesions of normal ulnar artery and anastomotic anastomosis of the ulnar artery. According to the degree, the test results are the same as 1.2. 4. Normal ulnar artery and normal anastomosis between the ulnar and radial artery. The test is negative. The people in need of examination may have suspected ulnar artery and obstructive disease of anastomotic artery of the ruler. Tips: Maintain a normal diet and sleep. Normal value After the upper limbs were placed at the level of the heart, the time from the pale to the flushing of the palm skin was positive for >30s and negative for 30s. Clinical significance Abnormal results: determine the state of blood flow in the ulnar artery. 1. The ulnar artery is completely obstructed, and the test is positive. If the brachial artery is continuously compressed, the palm of the hand will continue to be pale, and the pressure will be changed to become flushed. 2. Incomplete ulnar artery occlusion, positive test. In the case of continuous compression of the brachial artery, the time from palm to pale flushing may be extended to varying degrees. 3. Obstructive lesions of normal ulnar artery and anastomotic anastomosis between the ulnar and radial arteries. According to the degree, the test results are the same as 1, 2 . 4. Normal ulnar artery, normal anastomosis between the ulnar and radial artery, the test was negative. The people in need of examination may have suspected ulnar artery and obstructive disease of anastomotic artery of the ruler. Positive results may be diseases: arteriosclerosis, thromboangiitis obliterans, aneurysms, radial artery injury precautions Taboo before the test: maintain a normal diet and sleep. Requirements for inspection: 1. Do not compress the vein at the same time when pressing the radial artery. 2. This test can not diagnose the cause of vascular occlusion. Inspection process 1. The patient takes a sitting position or a supine position and raises the upper limb. The examiner holds the patient's wrist, presses the radial artery with the thumb, and blocks the blood flow until the end of the test. Note that the grip should not be too tight to keep the venous return. 2. The patient repeatedly fists several times to promote venous return. 3. Let the patient lower the upper limb to the level of the heart, the fingers naturally relax, continue to oppress the radial artery. 4. Observe the color change of the skin on the palm and palm sides. 5. The above test can be repeated several times to increase the reliability of the test. Not suitable for the crowd Inappropriate people: generally not used as a routine medical examination. Adverse reactions and risks Nothing.