Anal Diameter

A serious anal stenosis can be excluded by determining the anal diameter. This is done either by placing a gloved little finger into the anal opening or by the use of graduated sounding instruments (Hegar sounds). In the newborn, there is a correlation between anal diameter and weight (Fig. 10.15).

Incomplete development and separation of the cloaca into the urogenital sinus and the rectum will result in various anorectal anomalies. An international classification of anorectal anomalies is available (Fig. 10.16) that helps to relate the embryologic aberration with the clinical appearance and presentation of the anomaly.

Figure 10.15 Mean anal diameter. From Haddad and Corkery (1985), by permission.

Figure 10.15 Mean anal diameter. From Haddad and Corkery (1985), by permission.

Male
Anal Agenesis
Anal agenesis without fistula 5

Female

Female

Hentai Accidental Anal

Imperforate anus

Pregnancy And Childbirth

Pregnancy And Childbirth

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