100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Absite: Colorectal Questions and Answers $12.99   Add to cart
Quickly navigate to
Preview
  2.  
  3. ABSITE
  4.  
  5. ABSITE

Exam (elaborations)

Absite: Colorectal Questions and Answers
 0 view  0 purchase
  • Course
  • ABSITE
  • Institution
  • ABSITE

anatomy and physiology: colon function  :-- secretes K and reabsorbs Na and water (mostly in R colon and cecum) anatomy and physiology: layers  :-- 4 ... mucosa (columnar epithelium), submucosa, muscularis propria, serosa (in to out) anatomy and physiology: describe muscularis mucosa vs m...

[Show more]

Preview 4 out of 39  pages

Document information

  • August 28, 2024
  • 39
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • absite colorectal questions and answers

Written for

  • ABSITE
  • ABSITE

Seller

avatar-seller
Apluss

Content preview

1
Elscores: Aug. 27, 24- 2024/2025

Absite: Colorectal Questions and Answers
anatomy and physiology: colon function


 :-- secretes K and reabsorbs Na and water (mostly in R colon and cecum)




anatomy and physiology: layers


 :-- 4 ... mucosa (columnar epithelium), submucosa, muscularis propria, serosa (in to out)




anatomy and physiology: describe muscularis mucosa vs muscularis propria


 :-- musc mucosa = small interwoven inner muscle layer just below mucosa but above

basement membrane ... musc propria = circular layer of muscle




anatomy and physiology: what part is retroperitoneal?


 :-- ascending, descending, and sigmoid colon ... peritoneum covers anterior upper and

middle 1/3 of the rectum




anatomy and physiology: plicae semilunares


 :-- transverse bands that form haustra




anatomy and physiology: taenia coli


 :-- 3 bands that run longitudinally along the colon, at rectosigmoid junction the taeniae

become broad and completely encircle the bowel




Exams and Correct Answers |Best Grades | Excellence | Success & Guaranteed Pass

, 2
Elscores: Aug. 27, 24- 2024/2025

anatomy and physiology: anorectal anatomy with important landmarks


 :-- distance from anal verge ... 2cm - dentate line .... 4cm - anorectal ring .... 8cm - end of

lower 1/3 .... 12cm - end of middle 1/3 .... 16cm - end of upper 1/3




anatomy and physiology: vascular supply


 :-- ascending and 2/3 of transverse colon - SMA (ileocolic, R and middle colic arteries)

.... 1/3 transverse, descending colon, sigmoid colon, upper portion of the rectum - IMA

(L colic, sigmoid branches, superior rectal artery) .... marginal artery - runs along colon

margin, connects SMA to IMA (provides collateral flow) .... arc of Riolan - short firect

connection between SMA and IMA .... 80% of blood flow goes to mucosa and

submucosa




anatomy and physiology: venous drainage


 :-- follows arterial except IMV, which goes to splenic vein ... splenic vein joins the SMV

to form the portal vein behind the pancreas




anatomy and physiology: superior rectal artery


 :-- branch of IMA




anatomy and physiology: middle rectal artery


 :-- branch of internal iliac - the lateral stalks during low anterior resection (LAR) or

abdominoperineal resection (APR) contain the middle rectal arteries




Exams and Correct Answers |Best Grades | Excellence | Success & Guaranteed Pass

, 3
Elscores: Aug. 27, 24- 2024/2025

anatomy and physiology: inferior rectal artery


 :-- branch of internal pudendal (which is a branch of internal iliac)




anatomy and physiology: rectal venous drainage


 :-- superior and middle rectal veins drain into the IMV and eventually the portal vein ....

inferior rectal veins drain into the internal iliac veins and eventually into the caval system




anatomy and physiology: nodal drainage


 :-- superior and middle rectum - drain into IMA nodal lymphatics .... lower rectum -

drains primarily to IMA nodes and also to internal iliac nodes .... bowel wall contains

mucosal and submucosal lymphatics




anatomy and physiology: watershed areas


 :-- splenic flexure aka Giffith's point - SMA and IMA junction .... rectum aka Sudak's

point - superior rectal and middle rectal junction ...colon more sensitive to ischeia than

small bowel 2/2 fewer collaterals




anatomy and physiology: part of bowel most sensitive to ischemia


 :-- colon is more sensitive to ischemia than small bowel 2/2 decreased collaterals




anatomy and physiology: external vs internal sphincter - muscle, innervation




Exams and Correct Answers |Best Grades | Excellence | Success & Guaranteed Pass

, 4
Elscores: Aug. 27, 24- 2024/2025

 :-- external = puborectalis muscle, continuation of levator ani (striated) muscle, under

CNS control via inferior rectal branch of internal pudendal nerve .... internal =

continuation of muscularis (smooth) muscle, involuntary control, normally contracted




anatomy and physiology: inner and outer nerve plexi


 :-- inner = meissner's plexus ... outer = Auerbach's plexus




anatomy and physiology: sympathetic vs parasympathetic


 :-- sympathetic = lumbar and sacral plexi .... parasympathetic = pelvic splanchnic nerves




anatomy and physiology: distance from anal verge - anal canal, rectum, rectosigmoid junction


 :-- anal canal 0-5cm .... rectum 5-15cm ... rectosigmoid junction 15-18cm




anatomy and physiology: levator ani


 :-- marks the transition between anal canal and rectum




anatomy and physiology: crypts of lieberkuhn


 :-- mucus-secreting goblet cells




anatomy and physiology: colonic inertia


 :-- slow transit time, pts may need subtotal colectomy




Exams and Correct Answers |Best Grades | Excellence | Success & Guaranteed Pass

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller Apluss. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $12.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

79751 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$12.99
  • (0)
  Add to cart