logging in or signing up The Anatomy of Rectum visprod Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 1405 Category: Education License: All Rights Reserved Like it (5) Dislike it (0) Added: November 04, 2010 This Presentation is Public Favorites: 0 Presentation Description A presentation on the gross, microscopic and clinical anatomy of rectum Comments Posting comment... By: visprod (12 month(s) ago) @rohancool123: You can download the presentation if you wish to. The link is provided on the right side of this page. Saving..... Post Reply Close Saving..... Edit Comment Close By: rohancool123 (16 month(s) ago) nice ppt sir. can u please email it to bariya.rohan@gmail.com Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript Slide 1: Tirunelveli Medical College Department of Anatomy Slide 2: Rectum The Anatomy Of Presentation by K Hari Krishnan I Year MBBS (2008-’09) Tirunelveli Medical College Tirunelveli, Tamilnadu, India Slide 3: Distal part of the large gut The pelvic part of the alimentary tract Introduction Slide 4: Rectum Slide 5: Posterior part of the lesser pelvis In front of lower three pieces of sacrum and the coccyx Location Slide 6: Begins at the rectosigmoid junction at level of third sacral vertebra Ends at the anorectal junction 2-3 cm in front of and a little below the coccyx Extent Slide 7: Length 13 cm (5 in.) Diameter 4 cm (in the upper part) Dilated (in the lower part) Dimensions Slide 8: Dimensions Slide 9: Downwards and backwards Downwards Downwards and forwards Course Slide 10: Antero-posterior flexures (2 in number) Sacral flexure Follows the curve of the sacrum and coccyx Flexures Slide 11: Antero-posterior flexures Perineal flexure / Anorectal flexure 80° anorectal angle In the terminal part of the rectum At the anorectal junction Here the rectum perforates the pelvic diaphragm to become the anal canal Flexures Slide 13: Lateral flexures (3 in number) – correspond to the transverse rectal folds Superior Convex to the right Intermediate Convex to the left Most prominent Inferior Convex to the right Flexures Slide 14: Superior 1/3rd of the rectum Covered by peritoneum on the anterior and lateral surfaces Middle 1/3rd of the rectum Covered by peritoneum on the anterior surface Inferior 1/3rd of the rectum Subperitoneal – Devoid of peritoneum Peritoneal Relations Slide 15: Relations Slide 16: In males Upper 2/3rd Rectovesical pouch Coils of ileum Sigmoid colon Lower 1/3rd Fundus (base) of the urinary bladder Terminal parts of the ureters Seminal vesicles Ductus deferentes Prostate Visceral Relations Anterior Slide 17: Relations Slide 18: In females Upper 2/3rd Rectouterine pouch, which separates the rectum from the uterus and from the upper part of vagina Coils of ileum Sigmoid colon Lower 1/3rd Lower part of vagina Visceral Relations Posterior Slide 19: Relations Slide 20: Bones Lower three pieces of sacrum Coccyx Ligaments Anococcygeal ligament Muscles Piriformis Coccygeus Levator ani Vessels Median sacral Superior rectal Lower lateral sacral Nerves Sympathetic chain with ganglion impar Ventral primary rami of S3, S4, S5, Co1 Pelvic splanchnic nerves Lymph nodes and lymphatics Fat Posterior Relations Slide 21: Relations Slide 22: Relations Slide 24: Superior rectal artery Direct continuation of Inferior mesenteric artery Enters the pelvis by descending in the root of the sigmoid mesocolon and divides into right and left branches, which pierce the muscular coat and supply the mucous membrane They anastomose with one another and with the middle and inferior rectal arteries Middle rectal artery Small branch of anterior division of Internal iliac artery Run in the lateral ligaments of the rectum Supplies the muscular coat of the lower part of rectum Inferior rectal artery Branch of Internal pudental artery in the perineum Anastomoses with the middle rectal artery at the anorectal junction Median sacral artery Direct branch from the dorsal surface of Aorta near its inferior end Descends in the median plane Supplies the posterior wall of the anorectal junction Arterial Supply Slide 25: Arterial Supply Slide 26: Arterial Supply Slide 28: Venous Drainage Slide 29: Submucosal rectal venous plexus Surrounds rectum Communicates vesical venous plexus – males uterovaginal venous plexus – females 2 Parts: Internal rectal venous plexus Deep to the epithelium of rectum Drains into Superior rectal vein External rectal venous plexus External to the muscular wall of rectum Superior portion: drains into Superior rectal vein Middle portion: drains into Middle rectal vein Inferior portion: drains into Inferior rectal vein Venous Drainage Slide 30: Superior rectal vein Formed from Internal rectal venous plexus Consists of 6 main tributary veins Continues upwards as Inferior mesenteric vein Middle rectal vein Formed from the middle portion of External rectal venous plexus Pass alongside middle rectal artery Drains into the anterior division of Internal iliac vein on the lateral wall of the pelvis Inferior rectal vein Formed from the inferior portion of the Inferior rectal vein Drains into the Internal pudental vein Venous Drainage Slide 31: Venous Drainage Slide 32: Superior half of the rectum Pararectal lymph nodes, located directly on the muscle layer of the rectum Inferior mesenteric lymph nodes, via either the sacral lymph nodes or the nodes along the superior rectal vessels Inferior half of the rectum Sacral group of lymph nodes or Internal iliac lymph nodes Lymphatic Drainage Slide 33: Lymphatic Drainage Slide 34: Sympathetic nerve supply L1, L2 fibres Through Superior rectal and Inferior hypogastric plexuses Vasoconstrictor Inhibitory to musculature of rectum Motor to internal sphincter Carry sensations of pain Parasympathetic nerve supply S2, S3, S4 fibres Passes via pelvic splanchnic nerves and inferior hypogastric plexuses to rectal (pelvic) plexus Motor to musculature of the rectum Inhibitory to internal sphincter Carry sensations of pain and distension Nerve Supply Slide 35: Nerve Supply Slide 36: Nerve Supply Slide 38: Interior Slide 39: Longitudinal folds Present in lower part of the empty rectum Effaced during distension Interior Slide 40: Transverse folds (Houston’s valves or plicae transversae recti) Marked in rectal distension Superior fold At beginning of rectum Projects from the right or the left wall Middle fold Above the rectal ampulla Projects from the anterior and right walls Largest and most constant Inferior fold About 2.5 cm below the middle fold Projects from the left wall Variable Occasional fourth fold About 2.5 cm above the middle fold Projects from the left wall Interior Slide 41: Interior Slide 42: Histology Slide 44: Pelvic Floor Levator ani muscles Fascia of Waldeyer Condensation of pelvic fascia behind rectum Lower part of ampulla to Sacrum Encloses Superior rectal vessels and lymphatics Lateral ligaments of Rectum Denonvilliers fascia Pelvic peritoneum Perineal body Supports Slide 45: Supports Slide 47: Supports Slide 48: Clinical Aspects Slide 49: Examination to check for abnormalities of organs or other structures in the pelvis and lower abdomen To check for growths in or enlargement of the prostate gland in males. A tumor in the prostate can often be felt as a hard lump problems in female reproductive organs (uterus and ovaries) rectal bleeding or tumors in the rectum Digital Rectal Examination Slide 50: Proctoscopy - Visual examination of the rectum and anus Visualizing the interior of the rectum and anal canal Helps in revealing ulcers, abnormal growths and diverticula Proctoscopy Slide 51: Sigmoidoscope An endoscope for viewing the lumen of the sigmoid colon Sigmoidoscopy Slide 52: Sigmoidoscopes Slide 53: Rectocoele Protrusion of the mucous membrane and submucosa of the rectum outside the anus for approximately 1–4 cm Common in Children: 1 – 3 years Elderly people Middle-aged women Rectal Prolapse Slide 54: Rectal mucous membrane and submucous coat protrude for a short distance outside the anus Common in children Partial Rectal Prolapse Slide 55: Procidentia Whole thickness of the rectal wall protrudes through the anus A sliding hernia through the pelvic diaphragm Common in adults Associated with rectal incontinence Complete Rectal Prolapse Slide 56: Causes In infants Undeveloped sacral curve Reduced resting anal tone – diminished support to the mucosal lining of anal canal In children Diminution of fat in ischiorectal fossae Diarrhoea Severe whooping cough Sudden loss of weight Fibrocystic disease Neurological causes Mal-development of pelvis Rectal Prolapse Slide 57: Causes In adults Haemorrhoids Torn perineum Straining from urethral obstruction Following operation for fistula in ano In the elderly Atony of sphincter mechanism Rectal Prolapse Slide 58: Treatment Submucous injections Excision of the prolapsed mucosa Surgery Rectal Prolapse Slide 59: Found mainly in Rectosigmoid junction Ampulla Bleeding per rectum Initial finding – Lymphatics around the bowel Later – lymph nodes along superior rectal and middle rectal arteries Venous spread – Superior rectal vein to portal vein Liver – secondary deposits Rectal Carcinoma Slide 60: Treatment Rectal excision and total mesorectal excision Abdomino-perineal excision with a permanent colostomy Adjuvant preoperative radiotherapy Liver resection for liver metastases Rectal Carcinoma Slide 61: Gray’s Anatomy: The Anatomical Basis of Clinical Medicine Gray’s Anatomy for Students Richard S. Snell – Clinical Anatomy by Regions Keith L. Moore – Essential Clinical Anatomy Last’s Anatomy - Regional and Applied Frank H. Netter – Atlas of Human Anatomy Bailey and Love’s Short Practice of Surgery Sources Slide 62: Thank You! You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
The Anatomy of Rectum visprod Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 1405 Category: Education License: All Rights Reserved Like it (5) Dislike it (0) Added: November 04, 2010 This Presentation is Public Favorites: 0 Presentation Description A presentation on the gross, microscopic and clinical anatomy of rectum Comments Posting comment... By: visprod (12 month(s) ago) @rohancool123: You can download the presentation if you wish to. The link is provided on the right side of this page. Saving..... Post Reply Close Saving..... Edit Comment Close By: rohancool123 (16 month(s) ago) nice ppt sir. can u please email it to bariya.rohan@gmail.com Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript Slide 1: Tirunelveli Medical College Department of Anatomy Slide 2: Rectum The Anatomy Of Presentation by K Hari Krishnan I Year MBBS (2008-’09) Tirunelveli Medical College Tirunelveli, Tamilnadu, India Slide 3: Distal part of the large gut The pelvic part of the alimentary tract Introduction Slide 4: Rectum Slide 5: Posterior part of the lesser pelvis In front of lower three pieces of sacrum and the coccyx Location Slide 6: Begins at the rectosigmoid junction at level of third sacral vertebra Ends at the anorectal junction 2-3 cm in front of and a little below the coccyx Extent Slide 7: Length 13 cm (5 in.) Diameter 4 cm (in the upper part) Dilated (in the lower part) Dimensions Slide 8: Dimensions Slide 9: Downwards and backwards Downwards Downwards and forwards Course Slide 10: Antero-posterior flexures (2 in number) Sacral flexure Follows the curve of the sacrum and coccyx Flexures Slide 11: Antero-posterior flexures Perineal flexure / Anorectal flexure 80° anorectal angle In the terminal part of the rectum At the anorectal junction Here the rectum perforates the pelvic diaphragm to become the anal canal Flexures Slide 13: Lateral flexures (3 in number) – correspond to the transverse rectal folds Superior Convex to the right Intermediate Convex to the left Most prominent Inferior Convex to the right Flexures Slide 14: Superior 1/3rd of the rectum Covered by peritoneum on the anterior and lateral surfaces Middle 1/3rd of the rectum Covered by peritoneum on the anterior surface Inferior 1/3rd of the rectum Subperitoneal – Devoid of peritoneum Peritoneal Relations Slide 15: Relations Slide 16: In males Upper 2/3rd Rectovesical pouch Coils of ileum Sigmoid colon Lower 1/3rd Fundus (base) of the urinary bladder Terminal parts of the ureters Seminal vesicles Ductus deferentes Prostate Visceral Relations Anterior Slide 17: Relations Slide 18: In females Upper 2/3rd Rectouterine pouch, which separates the rectum from the uterus and from the upper part of vagina Coils of ileum Sigmoid colon Lower 1/3rd Lower part of vagina Visceral Relations Posterior Slide 19: Relations Slide 20: Bones Lower three pieces of sacrum Coccyx Ligaments Anococcygeal ligament Muscles Piriformis Coccygeus Levator ani Vessels Median sacral Superior rectal Lower lateral sacral Nerves Sympathetic chain with ganglion impar Ventral primary rami of S3, S4, S5, Co1 Pelvic splanchnic nerves Lymph nodes and lymphatics Fat Posterior Relations Slide 21: Relations Slide 22: Relations Slide 24: Superior rectal artery Direct continuation of Inferior mesenteric artery Enters the pelvis by descending in the root of the sigmoid mesocolon and divides into right and left branches, which pierce the muscular coat and supply the mucous membrane They anastomose with one another and with the middle and inferior rectal arteries Middle rectal artery Small branch of anterior division of Internal iliac artery Run in the lateral ligaments of the rectum Supplies the muscular coat of the lower part of rectum Inferior rectal artery Branch of Internal pudental artery in the perineum Anastomoses with the middle rectal artery at the anorectal junction Median sacral artery Direct branch from the dorsal surface of Aorta near its inferior end Descends in the median plane Supplies the posterior wall of the anorectal junction Arterial Supply Slide 25: Arterial Supply Slide 26: Arterial Supply Slide 28: Venous Drainage Slide 29: Submucosal rectal venous plexus Surrounds rectum Communicates vesical venous plexus – males uterovaginal venous plexus – females 2 Parts: Internal rectal venous plexus Deep to the epithelium of rectum Drains into Superior rectal vein External rectal venous plexus External to the muscular wall of rectum Superior portion: drains into Superior rectal vein Middle portion: drains into Middle rectal vein Inferior portion: drains into Inferior rectal vein Venous Drainage Slide 30: Superior rectal vein Formed from Internal rectal venous plexus Consists of 6 main tributary veins Continues upwards as Inferior mesenteric vein Middle rectal vein Formed from the middle portion of External rectal venous plexus Pass alongside middle rectal artery Drains into the anterior division of Internal iliac vein on the lateral wall of the pelvis Inferior rectal vein Formed from the inferior portion of the Inferior rectal vein Drains into the Internal pudental vein Venous Drainage Slide 31: Venous Drainage Slide 32: Superior half of the rectum Pararectal lymph nodes, located directly on the muscle layer of the rectum Inferior mesenteric lymph nodes, via either the sacral lymph nodes or the nodes along the superior rectal vessels Inferior half of the rectum Sacral group of lymph nodes or Internal iliac lymph nodes Lymphatic Drainage Slide 33: Lymphatic Drainage Slide 34: Sympathetic nerve supply L1, L2 fibres Through Superior rectal and Inferior hypogastric plexuses Vasoconstrictor Inhibitory to musculature of rectum Motor to internal sphincter Carry sensations of pain Parasympathetic nerve supply S2, S3, S4 fibres Passes via pelvic splanchnic nerves and inferior hypogastric plexuses to rectal (pelvic) plexus Motor to musculature of the rectum Inhibitory to internal sphincter Carry sensations of pain and distension Nerve Supply Slide 35: Nerve Supply Slide 36: Nerve Supply Slide 38: Interior Slide 39: Longitudinal folds Present in lower part of the empty rectum Effaced during distension Interior Slide 40: Transverse folds (Houston’s valves or plicae transversae recti) Marked in rectal distension Superior fold At beginning of rectum Projects from the right or the left wall Middle fold Above the rectal ampulla Projects from the anterior and right walls Largest and most constant Inferior fold About 2.5 cm below the middle fold Projects from the left wall Variable Occasional fourth fold About 2.5 cm above the middle fold Projects from the left wall Interior Slide 41: Interior Slide 42: Histology Slide 44: Pelvic Floor Levator ani muscles Fascia of Waldeyer Condensation of pelvic fascia behind rectum Lower part of ampulla to Sacrum Encloses Superior rectal vessels and lymphatics Lateral ligaments of Rectum Denonvilliers fascia Pelvic peritoneum Perineal body Supports Slide 45: Supports Slide 47: Supports Slide 48: Clinical Aspects Slide 49: Examination to check for abnormalities of organs or other structures in the pelvis and lower abdomen To check for growths in or enlargement of the prostate gland in males. A tumor in the prostate can often be felt as a hard lump problems in female reproductive organs (uterus and ovaries) rectal bleeding or tumors in the rectum Digital Rectal Examination Slide 50: Proctoscopy - Visual examination of the rectum and anus Visualizing the interior of the rectum and anal canal Helps in revealing ulcers, abnormal growths and diverticula Proctoscopy Slide 51: Sigmoidoscope An endoscope for viewing the lumen of the sigmoid colon Sigmoidoscopy Slide 52: Sigmoidoscopes Slide 53: Rectocoele Protrusion of the mucous membrane and submucosa of the rectum outside the anus for approximately 1–4 cm Common in Children: 1 – 3 years Elderly people Middle-aged women Rectal Prolapse Slide 54: Rectal mucous membrane and submucous coat protrude for a short distance outside the anus Common in children Partial Rectal Prolapse Slide 55: Procidentia Whole thickness of the rectal wall protrudes through the anus A sliding hernia through the pelvic diaphragm Common in adults Associated with rectal incontinence Complete Rectal Prolapse Slide 56: Causes In infants Undeveloped sacral curve Reduced resting anal tone – diminished support to the mucosal lining of anal canal In children Diminution of fat in ischiorectal fossae Diarrhoea Severe whooping cough Sudden loss of weight Fibrocystic disease Neurological causes Mal-development of pelvis Rectal Prolapse Slide 57: Causes In adults Haemorrhoids Torn perineum Straining from urethral obstruction Following operation for fistula in ano In the elderly Atony of sphincter mechanism Rectal Prolapse Slide 58: Treatment Submucous injections Excision of the prolapsed mucosa Surgery Rectal Prolapse Slide 59: Found mainly in Rectosigmoid junction Ampulla Bleeding per rectum Initial finding – Lymphatics around the bowel Later – lymph nodes along superior rectal and middle rectal arteries Venous spread – Superior rectal vein to portal vein Liver – secondary deposits Rectal Carcinoma Slide 60: Treatment Rectal excision and total mesorectal excision Abdomino-perineal excision with a permanent colostomy Adjuvant preoperative radiotherapy Liver resection for liver metastases Rectal Carcinoma Slide 61: Gray’s Anatomy: The Anatomical Basis of Clinical Medicine Gray’s Anatomy for Students Richard S. Snell – Clinical Anatomy by Regions Keith L. Moore – Essential Clinical Anatomy Last’s Anatomy - Regional and Applied Frank H. Netter – Atlas of Human Anatomy Bailey and Love’s Short Practice of Surgery Sources Slide 62: Thank You!