system
Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: BACKGROUND, PURPOSE, MATERIAL AND METHODS, RESULTS. Meshes: Anesthetics, Local, Arthrography, Contrast Media, Gadolinium, Health Surveys, Humans, Injections, Intra-Articular, Injections, Subcutaneous, Lidocaine, Magnetic Resonance Imaging, Pain Measurement, Shoulder Pain.
user
Is subcutaneous local anesthesia in shoulder magnetic resonance arthrography necessary? Context: Magnetic resonance arthrography is a well-established diagnostic method in degenerative and traumatic disorders of the shoulder. Some radiologists prefer to apply a local anesthetic to the skin prior to performing the joint puncture. However, no information regarding the efficacy of local anesthetics exists. To assess patient discomfort in arthrography injection. A patient survey (n = 74) utilizing a visual analog scale (VAS) measured the intensity of pain in arthrography injection by those receiving local anesthetics (n = 36) versus those who did not (n = 38). Mean VAS scores were 20.8 (median 10.5, SD 24.3) for those receiving local anesthetics versus 19.3 (median 13.0, SD 20.7) for those who did not (P = 0.83, Mann-Whitney U test).
assistant
Routine use of local anesthesia of the skin in arthrography injection is unnecessary.