A therapist assesses deep anal pressure (DAP) in an SCI patient. Which technique is used?

A therapist assesses deep anal pressure (DAP) in an SCI patient. Which technique is used?

• A. Palpating the external anal sphincter during voluntary contraction.
• B. Observing reflex contraction during pinprick testing at S4-S5.
• C. Applying digital pressure to the anorectal wall and asking the patient to report sensation.
• D. Using a cotton swab to test light touch at the perianal region.

Answer: (C)

Deep anal pressure testing assesses the sensory perception of deep pressure in the anorectal region, reflecting the integrity of sacral afferent pathways. In this method, the therapist uses a gloved finger to apply firm, deep pressure to the anorectal wall and asks the patient to report when the sensation is felt. This specific stimulus targets deeper sensory fibers that convey pressure, providing information about sacral (S2-S4) function and sacral sparing after spinal cord injury. Why this approach fits best: it directly evaluates a deep, pressure-related sensation, which is more informative about sacral sensory preservation than superficial touch or pain reflex testing. The other techniques either measure motor function (palpating the external anal sphincter during voluntary contraction), test a different sensory modality (pinprick reflex testing for pain), or assess superficial touch (cotton swab) rather than deep pressure.

Deep anal pressure testing assesses the sensory perception of deep pressure in the anorectal region, reflecting the integrity of sacral afferent pathways. In this method, the therapist uses a gloved finger to apply firm, deep pressure to the anorectal wall and asks the patient to report when the sensation is felt. This specific stimulus targets deeper sensory fibers that convey pressure, providing information about sacral (S2-S4) function and sacral sparing after spinal cord injury.

Why this approach fits best: it directly evaluates a deep, pressure-related sensation, which is more informative about sacral sensory preservation than superficial touch or pain reflex testing. The other techniques either measure motor function (palpating the external anal sphincter during voluntary contraction), test a different sensory modality (pinprick reflex testing for pain), or assess superficial touch (cotton swab) rather than deep pressure.