jackknife position


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A position in which the patient lays prone in an inverted position on a specialized table, which is particularly helpful to permit a considerable degree of manoeuvrability of the scope during anoscopy

jack·knife po·si·tion

(jaknīf pŏ-zishŏn)
Positioning a patient on on her or his stomach, with knees at a 90-degree angle and arms outstretched.

jackknife position

A position in which the patient lies on the back, shoulders elevated, legs flexed on thighs, thighs at right angles to the abdomen. It is used when introducing a urethral sound.
Synonym: reclining position
See also: position