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ANAL CANAL DR NOOR US SABA ANAL CANAL DR NOOR US SABA

ANAL CANAL DR NOOR US SABA - PowerPoint Presentation

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Uploaded On 2022-06-07

ANAL CANAL DR NOOR US SABA - PPT Presentation

SR DEPARTMENT OF ANATOMY JNMCH AMU ALIGARH PELVIC CAVITY Area bw inlet amp outlet of pelvis Pelvic diaphragm Main pelvic cavity above perineum below PERINEUM Pelvic diaphragm Perineum below ID: 914649

rectal anal canal amp anal rectal amp canal inf pelvic internal perineum perianal part line body sphincter structure deep

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Presentation Transcript

Slide1

ANAL CANAL

DR NOOR US SABA

SR, DEPARTMENT OF ANATOMY

JNMCH, AMU, ALIGARH

Slide2

PELVIC CAVITY

Area b/w inlet & outlet of pelvis

Pelvic diaphragm

Main pelvic cavity (above)perineum (below)

Slide3

PERINEUM

Pelvic diaphragm

Perineum (below)

Formed by

levator ani, & coccygeus M

Slide4

Boundaries

Post

- tip of coccyx,

Side

- ischial tuberosity & sacrotuberous ligament, Ant

- imaginary line

Slide5

ANAL CANAL

Location & description

Length- 1.5” (4cm)

Between- rectal ampulla & anus

RelationsPost- anococcygeal bodyLat- ischiorectal fossa (fat)

Ant-

perineal body,

urogenitaldiaphragm

Slide6

ANAL CANAL STRUCTURE

Upper half

Columnar epithelium

Anal columns, anal valves

Nerves- inf hypogastric plexus

Vessels

- sup rectal A, sup rectal V

Lymphatic drainage-

pararectal, inf mesenteric nodes

Slide7

ANAL CANAL STRUCTURE

Lower half

Str

squamous epithelium

Nerves- inf rectal N (somatic)Vessels- inf rectal A, &

inf

rectal V

Lymphatic drainage-

superficial inguinal LNUPPER HALF AND LOWER HALF OF ANAL CANAL JOINS AT THE

PECTINATE LINE (DENTATE LINE)

Slide8

ANAL SPHINCTERS

INVOLUNTARY

(internal)

VOLUNTARY (external)Internal anal sphincter-

thickened smooth MExternal anal sphincter- Subcutaneous partSuperficial part- attached to bone

Deep part

Slide9

ANAL CANAL

Slide10

CLINICAL APPLICATION

Digital Rectal

E

xamination

Anorectal ringjunction of rectum and anal canalFormed by- puborectalis

, internal sphincter & deep part of

extsphincter

Anteriorly

- post surface of bladder (vagina & cervix in females), prostate, perineal body

Posteriorly- sacrum, coccyx, anococcygeal bodyLaterally- ischiorectal fossa, ischial spine

Slide11

CLINICAL…

Porto-systemic anastomosis

Internal hemorrhoids (piles)

External hemorrhoids

Perianal hematomaAnal fissure

Perianal abscess, anal fistula, anal sinus

Anorectal foreign body

Nerve block (perianal skin)

Rectal prolapse, incontinence

Carcinoma