Correct visualization of the anal ring.
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Anal Canal↗
Biomedical subjects
D Levien
Publications and source records attributed to D Levien.
Pictures of Episcopal hospital, Philadelphia, PA: part I (1851-1926).
The merit of images, often posed, often retouched, as historical documents has been debated by numerous scholars. Nonetheless, portraits, illustrations, and photographs form one of the more delightful avenues for recapturing elements of medical care as it was practiced in the past. Part one of this two-part photo-essay records the first cycles of growth and contraction that characterized the history of one of Philadelphia's foremost medical institutions: The Hospital of the Protestant Episcopal Church of Philadelphia.
Ambulances↗
Practice parameters for sigmoid diverticulitis. The Standards Task Force American Society of Colon and Rectal Surgeons.
It should be recognized that these guidelines should not be deemed inclusive of all proper methods of care or exclusive of methods of care reasonably directed to obtaining the same results. The ultimate judgment regarding the propriety of any specific procedure must be made by the physician in light of all of the circumstances presented by the individual patient.
Acute Disease↗
Manometric study of the voluntary inhibition action in normal volunteers.
PURPOSE: A voluntary inhibition action whereby a voluntary squeeze of the external sphincter causes reflex relaxation of the rectum has been previously proposed but not proven. Such a reflex would enable the subject to defer defecation to a socially acceptable time. The purpose of this study was to determine whether or not such a reflex exists. METHODS: We measured rectal compliance with and without a voluntary squeeze using a specially designed balloon catheter in nine subjects. RESULTS: When corrected for increased intra-abdominal pressure caused by inadvertent Valsalva's maneuver during voluntary squeezing, there was a significant increase in rectal compliance during voluntary contraction of the external sphincter (P < 0.01). CONCLUSION: This lends support to the proposed existence of the voluntary inhibition action.
Adult↗