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Popliteal Fossa Block
膕窩阻滯
Overview（概述）
This outpatient procedure numbs the lower leg with an injection of local anesthesia. Typically, it is used for surgery on the lower leg, ankle and foot.
這個門診操作通過注射局部麻醉劑，麻醉小腿。 通常用於小腿，腳踝和腳的手術。
Preparation（準備）
It is common for the patient to lie face down with the back of the leg exposed. The back of the knee joint, called the popliteal fossa, is cleaned and sterilized, and a local anesthetic is administered to numb the tissue at the injection site.
患者通常採取俯臥位，暴露的腿後部。對膝關節的後方被稱為膕窩的部位進行清潔和消毒。用局部麻醉劑以麻醉注射部位的組織。
Locating the Nerve（定位神經）
The physician locates the tibial and peroneal branches of the sciatic nerve, either with ultrasound or with a special needle that stimulates nerves with an electrical impulse. The nerve branches travel down the rear of the leg to the feet. A needle is carefully guided through the back of the knee and down to the nerve.
醫生通過超聲波或用特殊的針頭釋放電脈衝刺激神經來定位坐骨神經的脛神經和腓神經。 這些神經分支沿著腿的後部下行到腳。 小心地將一根針穿過膝關節後方，並深入到神經。
Injecting the Anesthetic（注射麻醉劑）
Anesthetic is slowly injected through the needle, bathing one or both nerves and temporarily blocking sensation in the lower leg, ankle and foot.
通過針頭將麻醉劑緩慢地注入，浸潤其中一根或同時浸潤兩根神經，暫時阻斷小腿、踝關節和足的感覺。
After Care（術後護理）
The numbing sensation will last for several hours after the injection. When the anesthesia wears off, painkillers may be needed to alleviate pain from the procedure.
麻酸效果會在注射後持續幾個小時。 當麻醉失效時，可能需要止痛藥來減輕手術引起的疼痛。
（胡佰文 譯）
相關閱讀：
中英文字幕：區域麻醉（Regional Anesthesia）
中英文字幕：周圍神經阻滯（Peripheral Nerve Block）
中英文字幕：麻醉(Anesthesia)
中英文字幕：監護麻醉處理(Monitored Anesthesia Care, MAC)
中英文字幕：腰麻 (Lumbar Puncture, Spinal Anesthesia)
中英文字幕：局部麻醉/Anesthesia (Local)
中英文字幕：全身麻醉/Anesthesia (General)
中英文字幕：硬膜外麻醉(Anesthesia /Epidural)
中英文字幕：麻醉（清醒鎮靜）/Anesthesia (Conscious Sedation)
中英文字幕：多模式聯合麻醉和鎮痛（Ｍultimodal Anesthesia and Pain Control)
醫學動畫：脊髓和硬膜外麻醉（Spinal and Epidural Anesthesia）
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