Reiner C B, Meites S, Hayes J R
Department of Pathology, Children's Hospital, Columbus, OH 43205.
Clin Chem. 1990 Mar;36(3):547-9.
Postmortem measurements were made of distances from skin surface to underlying bone/cartilage on 43 children (up to 8 y old; weights from 0.7 to 26.4 kg) to determine optimal sites and lengths of lancet tips for skin puncture of the heel, great toe, and middle finger. For measuring depths, a needle-like probe was devised that minimized disfigurement. As long as the infant's heel was available for puncture prior to callus formation (to about six months), it offered the greatest depth and the bone/cartilage of the lateral/medial sites was considerably deeper than posterior sites. At age six months, the mean distance of skin surface. At age six months, the mean distance of skin surface to bone/cartilage in the middle finger was 2.5 mm, the lower 95% prediction interval being 1.5 mm. Lengths of lancet tips for finger puncture should therefore be made less than 1.5 mm. To get the desired volumes of blood, a compromise must be reached between depth and width of the lancet tip.
对43名儿童（年龄最大8岁；体重0.7至26.4千克）进行了死后测量，测量从皮肤表面到其下方骨骼/软骨的距离，以确定用于足跟、大脚趾和中指皮肤穿刺的采血针最佳穿刺部位和长度。为测量深度，设计了一种针状探头，将皮肤损伤降至最低。只要婴儿足跟在形成老茧前（约六个月）可用于穿刺，它就能提供最大深度，且外侧/内侧部位的骨骼/软骨比后侧部位深得多。六个月大时，中指皮肤表面到骨骼/软骨的平均距离为2.5毫米，95%的较低预测区间为1.5毫米。因此，用于手指穿刺的采血针长度应小于1.5毫米。为获取所需血量，必须在采血针尖端的深度和宽度之间达成妥协。
