We read with great interest the article by Dr Wall in the June 1977 issue reporting arterial blood sampling by transilluminator. However, sometimes it is very cumbersome to do arterial blood samplings or cannulation using the transilluminator in a limited space such as the neonatal incubator. We have found that the bright otoscope (Welch Allyn model no. 25000) without ear piece works out efficiently to locate radial, ulnar, dorsalis pedis, and posterior tibial arteries in premature babies in a dark room.

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