Nerve Ultrasonography for the Diagnosis and Evaluation of Neuralgic Amyotrophy.

Neuralgic amyotrophy (NA) is a peripheral nervous system disorder involving multifocal distribution. Although nerve ultrasonography has shown potential for detecting NA lesions, no established detection method exists for distal forearm NA. A 59-year-old man presented with weakness of the muscles innervated by the left posterior interosseous nerve (PIN), median nerve (MN), anterior interosseous nerve (AIN), and ulnar nerve (UN), following severe left shoulder pain. This case suggests that nerve ultrasonography can help accurately diagnose distal forearm NA.

Impact of anatomical variations on ultrasonographic reference values of lower extremity peripheral nerves.

INTRODUCTION/AIMS: Cross-sectional area (CSA) reference values using ultrasonography vary widely for lower extremity peripheral nerves. In addition, there is a lack of data on the muscular branches of the tibial nerve and the anatomical variations of the sural nerve. We aimed to evaluate the ultrasonographic reference values for lower extremity peripheral nerves considering different anatomical variations and physical factors. METHODS: The CSA of the lower extremity nerve was measured at 10 sites. In addition to establishing reference values, differences in the CSA owing to anatomical variations were verified. The relationship between CSA and physical factors, such as age, height, weight, body mass index, and ankle circumference, was also examined. RESULTS: A total of 100 healthy Japanese volunteers were recruited. The mean CSA of the sural nerve significantly differed depending on its formation pattern (1.4-1.8 mm2 ). The mean decreases in CSAs from the proximal to distal tibial and fibular nerves within the popliteal region significantly differed based on the fine branching pattern. The maximum value of the mean decreases in CSAs in the tibial and fibular nerves reached 7.2 and 2.5 mm2 , respectively. With respect to physical factors, age and ankle circumferences were associated with CSA at several measurement sites. DISCUSSION: Fine branching from the tibial and fibular nerves and sural nerve formation may affect CSA measurements. The establishment of accurate CSA reference values requires consideration of anatomical variations in the peripheral nerves of the lower extremity.

Controlling nutritional status score for predicting 3-mo functional outcome in acute ischemic stroke.

BACKGROUND: Malnutrition is an independent risk factor for poor outcomes in patients with acute ischemic stroke. However, the indicator of malnutrition has not yet been established. We investigated the relationship between the Controlling Nutritional Status score, a useful prognostic measure of malnutrition in patients with cardiovascular diseases and malignant tumors, and functional outcomes in patients with acute ischemic stroke. METHODS: Patients with acute ischemic stroke (n = 264, 71 ± 12 y old) were consecutively evaluated within 7 d of stroke onset. The Controlling Nutritional Status score was calculated from the serum albumin, total peripheral lymphocyte count, and total cholesterol; a Controlling Nutritional Status score of 5 to 12 was defined as malnutrition. Poor functional outcome was defined as a modified Rankin Scale score of 3 to 6 at 3 mo. RESULTS: Of the total cohort, 230 patients (87.1%) were assessed. The patients with poor functional outcome (n = 85) were older; had a lower body mass index; had a higher frequency of atrial fibrillation, chronic heart failure, and anemia; and had a lower frequency of dyslipidemia and a current smoking status. In addition, the Controlling Nutritional Status score and National Institutes of Health Stroke Scale score at admission were significantly higher for the patients with poor functional outcome. After multivariate analysis, adjusted for baseline characteristics, a Controlling Nutritional Status score of 5 to 12 was found to be independently associated with poor outcome (odds ratio: 4.15, 95% confidence interval: 1.52-11.67, P = 0.005). CONCLUSIONS: The Controlling Nutritional Status score at admission could be a useful prognostic marker of 3-mo functional outcomes in patients with acute ischemic stroke.