The hand-held device detects the distance between a muscle and an outer skin layer in a body by impacting the outer surface of the skin and detecting the distance to the muscle from that point of engagement. The device includes a first end including a force sensor configured to detect the force of an impact of the first end to an associated body part. The device further includes a distance sensor provided at the first end configured to detect the distance between a skin outer layer and a muscle and a main body configured to receive a hand. The detection device includes a controller and processor to detect the impact force and distance between the skin outer layer and muscle at engagement. The device may be used in a method of determine muscle depth and/or location in connection with the prescription and/or administration of anaphylaxis medications by auto injector.本發明揭示一種手持式裝置,其藉由衝擊一身體中之皮膚的外表面及偵測自彼接合點至一肌肉的距離來偵測該肌肉與該外皮膚層之間的距離。該裝置包含一第一端,該第一端包含經構形以偵測該第一端對一相關聯身體部分之一衝擊力之一力感測器。該裝置進一步包含:經提供於該第一端處之一距離感測器,其經構形以偵測一外皮膚層與一肌肉之間的距離;及一主體,其經構形以接納一手。該偵測裝置包含一控制器及處理器,以偵測該衝擊力及接合處之該外皮膚層與肌肉之間的距離。該裝置可被用在與自動注射器指定及/或施打過敏性反應藥物有關之判定肌肉深度及/或位置之一方法中。10‧‧‧肌肉深度偵測裝置/深度偵測裝置/偵測裝置/裝置/深度裝置/深度偵測探針/肌肉偵測裝置12‧‧‧第一端或近端14‧‧‧第二端或末端16‧‧‧裝置控制特徵/控制特徵/開/關選擇器18‧‧‧裝置控制特徵/控制特徵/深度啟動選擇器20‧‧‧裝置控制特徵/控制特徵/力啟動選擇器22‧‧‧偵測感測器/深度感測器或探針/感測器/超音波掃描感測器24‧‧‧偵測感測器/力感測器/壓力感測器/感測器25‧‧‧彈性部件26‧‧‧本體B‧‧‧身體do‧‧‧偏轉距離
