英国卫生部的疫苗注射指引明确指出无需aspirate,因为该处肌肉没有大的静脉血管:
There is no need to pull back on the plunger (aspirate) before the plunger is depressed to release the vaccine into the muscle because there are no large blood vessels at the recommended injection sites
Remove the needle and if there is any visible blood at the injection site, the patient can apply pressure to the site with a piece of gauze or cotton wool.
楼主引用老鼠试验不足为据,中国护士的操作落后时代。