1. Open Inguinal & Ventral Hernia Repair Andrew Gassman 8/3/11
Resident Conference
Open Inguinal & Ventral Hernia Repair
Andrew Gassman
8/3/11

2. Inguinal Hernia

3. Inguinal Hernia Epidemiology
Worldwide: 20 million groin hernias are repaired each year.
In the US
1,000,000 abdominal wall herniorrhaphies are performed each year
750,000 - inguinal, 166,000 – umbilical, 97,000 -incisional, 25,000 - femoral,
75% of all abdominal wall hernias occur in the groin.
R > L
M > F (7-FOLD)
In Men: Indirect >> Direct >>>>Femoral
In Women Indirect > Femoral > Direct
Femoral hernias account for fewer than 10% of all groin hernias
40% present as emergencies (i.e., with incarceration or strangulation)
Mortality is higher for emergency repair than for elective repair
Emergency operations are more frequently required for female patients.

4. Natural History RJ Fitzgibbons, A Giobbie-Hurder, JO Gibbs, Watchful waiting vs repair of inguinal hernia in minimally symptomatic men: a randomized clinical trial. JAMA 2006 vol:295 page:285
Randomized, controlled trial from 2006,
Minimally symptomatic inguinal hernia was addressed in a in which
364 men were assigned to 'watchful waiting' (WW)
356 men underwent routine operation.
Only two patients in the WW group required emergency operations for strangulation over the follow-up period of 2 to 4.5 years.
This result is about 1/5 of 1% for each year that the hernia remains unrepaired.
The two patients who required emergency operations recovered uneventfully.
At the conclusion of the study, functional status, as measured by quality-of-life instruments and pain scales, was identical in the two groups.
Postoperative complication rates were the same in patients who underwent immediate surgery as in those who were assigned to watchful waiting but had to cross over to surgical treatment.

5. Physiology / Pathophysiology
Inguinal Hernia
Either indirect or direct
Indirect inguinal hernia
Passes through internal inguinal ring, traverses inguinal canal to external ring
May extend into scrotum in males and labia majora in females
Passes lateral to inferior epigastric vessels and has an oblique inferior course
Considered a congenital defect and associated with a patent processus vaginalis
5x more common than direct inguinal hernias
Direct inguinal hernia
Protrusion through Hesselbach triangle
Generally does not extend into scrotum
Passes medial to inferior epigastric vessels
Considered an acquired defect
Inguinal hernias 5-10x more common in men

6. Anatomy Anterior Pelvis Inguinal Boundaries: Muscles:
External Oblique – Most superficial
Course Inferiomedial
Internal Oblique – Middle Flat
Course Superiomedial
Transversus Abdominus – Inner Most Flat muscle
Course Transversely
Rectus Abdominus
Vertical Strap Muscle
Inguinal Boundaries:
Superior – Aponeurosis of Tansversus Abdominus (Falx Inguinalis)
Fuses with internal oblique aponeurosis to form conjoined tendon medially
Inferior – Inguinal Ligament
Medial portion – attached on pectineal/ Cooper’s ligament
Posterior – Tansversalis Fascia
Fuses anteriorly and inferior as the ileopubic tract
Anterior – External oblique Aponeurosis
Forms shelving edge when traveling inferiorly and posteriorly cradling cord structures
Inserts into inguinal ligament and travels posteriorly to ileopubic tract.

7. Canal Anatomy

8. Fascial Anatomy Transversalis fascia Forms anatomic landmarks
attached to the iliac crest laterally
inserts on the pubic tubercle medially
Forms anatomic landmarks
iliopectineal arch,
iliopubic tract,
the thickened band of the transversalis fascia that courses parallel to the more superficially located inguinal ligament
crura of the deep inguinal ring,
Continues into insert into Cooper's ligament (i.e., the pectineal ligament) a condensation of the periosteum .

9. Fascial Anatomy
Between the transversalis fascia and the peritoneum is the preperitoneal space.
In the midline behind the pubis - The space of Retzius;
Laterally - The space of Bogros.
The preperitoneal many of the inguinal hernia repairs are performed in this area.
Within the preperitoneal space:
inferior epigastric vessels
deep inferior epigastric vein
iliopubic vein
retropubic vein
internal spermatic vessels
vas deferens

10. Inguinal Anatomy Inguinal Canal Internal or deep ring
Passage through anterior abdominal wall
Conveys spermatic cord in males and round ligament in females
Formed embryologically by evagination of processus vaginalis through anterior abdominal wall
Internal or deep ring
Opening through transversalis fasciaLocated above mid-portion of inguinal ligament
Lateral to inferior epigastric artery
External or superficial ring
Triangular opening of external oblique aponeurosisJust lateral to pubic tubercle
Hesselbach triangle Area of weakness in pelvic wall
Site of direct inguinal hernias
Medial border: Lateral edge of rectus sheath
Lateral border: Inferior epigastric artery
Inferior border: Inguinal ligament

11. Inguinal Anatomy

12. Inguinal Nerves

13. Types of Repair

14. Marcy Repair
Children and young adults Concern about the long-term prosthetic material.
High ligation of the sac and narrowing of the internal ring.
Displacing the cord structures laterally allows the placement of sutures through the muscular and fascial layers

15. Bassini Repair
Reconstruction of the inguinal floor by opening the transversalis fascia from the internal inguinal ring to the pubic tubercle, thereby exposing the preperitoneal fat,
Bluntly dissected undersurface of the superior flap of the transversalis fascia
'triple layer' approximation
The layer of transversalis fascia and the transversus abdominis is sutured, with the internal oblique muscle, to the reflected inguinal ligament

16. Bassini Repair
Reconstruction of the inguinal floor by opening the transversalis fascia from the internal inguinal ring to the pubic tubercle, thereby exposing the preperitoneal fat,
Bluntly dissected undersurface of the superior flap of the transversalis fascia
'triple layer' approximation
The layer of transversalis fascia and the transversus abdominis is sutured, with the internal oblique muscle, to the reflected inguinal ligament

17. Shouldice Repair 2 layers
A continuous running suture re-approximates the inguinal floor
A second layer is started near the internal ring, approximating the internal oblique muscle and the transversus abdominis to a band of external oblique aponeurosis superficial and parallel to Poupart's ligament
This suture line ends at the pubic crest.
A fourth suture line may be added

18. Shouldice Repair 2 layers
A continuous running suture re-approximates the inguinal floor
A second layer is started near the internal ring, approximating the internal oblique muscle and the transversus abdominis to a band of external oblique aponeurosis superficial and parallel to Poupart's ligament
This suture line ends at the pubic crest.
A fourth suture line may be added

19. Shouldice Repair

20. Shouldice Repair

21. McVay Repair Similar to the Bassini repair,
Except that it uses Cooper's ligament instead of the inguinal ligament
Interrupted sutures are placed from the pubic tubercle laterally along Cooper's ligament, progressively narrowing the femoral ring
Treatment of Femoral Hernia
The last stitch in Cooper's ligament is known as a transition stitch and includes the inguinal ligament.
Relaxing Incision

22. McVay Repair

23. Lichtenstein Repair

24. Femoral Anatomy Femoral Hernia
Begins posterior to medial portion of inguinal ligament
Traverses femoral canal to fossa ovalis
Herniated contents are below inguinal ligament, lateral to pubic tubercle and medial to femoral vessels
More common in older women

25. Femoral Anatomy Below the iliopubic tract
Iliopectineal arch separates the vascular compartment (femoral vessels) from the neuromuscular compartment (iliopsoas muscle, the femoral nerve, and the lateral femoral cutaneous nerve)
Vascular compartment
3 subcompartments:
(1) the lateral, containing the femoral artery and the femoral branch of the genitofemoral nerve;
(2) the middle, containing the femoral vein;
(3) the medial, which is the cone-shaped cul-de-sac known as the femoral canal.
The femoral canal is normally a 1 to 2 cm blind pouch that begins at the femoral ring and extends to the level of the fossa ovalis.
normally contains preperitoneal fat, connective tissue, and lymph nodes (including Cloquet's node at the femoral ring)
The femoral ring is bordered by the superior pubic ramus inferiorly, the femoral vein laterally, and the iliopubic tract (with its curved insertion onto the pubic ramus) anteriorly and medially.
A femoral hernia exists when the blind end of the femoral canal becomes an opening (the femoral orifice) through which a peritoneal sac can protrude.

26. Femoral Anatomy

27. Ventral Hernia

28. Fascial Anatomy Linea alba Rectus sheath
Raphe of the flat abdominal muscles
Rectus sheath
Invests
Rectus abdominis muscles
Epigastric vessels
Aponeuroses of external oblique, internal oblique and transversus abdominis muscles
Internal oblique aponeurosis splits:
Upper abdominal wall:
Anterior portion and joins external oblique aponeurosis to form anterior rectus sheath
Posterior portion joins transversus abdominis aponeurosis to form posterior rectus sheath
Lower third of abdominal wall (below anterior superior iliac spine)
all aponeurosis join and course anterior to rectus abdominis muscles
Creates arcuate line on posterior surface of abdominal wall
Below arcuate line covered only by transversalis fascia, which is separated from parietal peritoneum by extraperitoneal fat

29. Fascial Anatomy

30. Ventral Hernia Epidemiology
Incidence of incisional hernia after laparotomy varies in reports 3-20%
Doubles with presence of infection
Upper midline incisions are associated with the highest incidence of ventral hernia formation
Transverse or oblique incisions with the lowest.
Most incisional hernias are detected within 1 year of surgery
Male-to-female incidence ratio is 1:1,
Early evisceration is more common in males.

31. Incisional hernia Risk factors for (Re/O)ccurrence: Male sex, age,
obesity,
jaundice,
underlying disease process,
wound infection,
abdominal distension,
pulmonary diseases

32. Timeline
Prior to 1960’s
Primary repair wit natural materials
Transposition of tissue
Advent of synthetic material – Polyproplene suture and mesh
Materials and positions for mesh closure
1983 PTFE used for mesh closure
1980’s Rives and Stoppa separately described Subfascial/ pre-peritoneal placement of mesh
1990 – Ramirez, described a method to close incisional hernia defects by separating the muscle planes of the abdominal wall termed, component separation.

33. Primary vs. Mesh-based repairs:
Sahlin and Roberts - primary repair.
No difference in recurrence rate for primary repairs performed with either monofilament or braided suture.
No difference for repairs performed in a running or interrupted fashion
Luijendijk et al.
at 3-years, regardless of hernia size, mesh repair was statistically superior to suture repair (43% vs. 24%) in the recurrence of midline abdominal incisional hernias.(21)
Burger et al.
Follow-up work by documented a 10-year cumulative recurrence rate of 63% for suture repair and 32% for underlay mesh repairs of first time midline incisional hernia defects <6cm. (22)
Tension is a feature common to both primary and mesh repairs
Excessive tension at the time of wound closure is a significant contributor to repair failure, local swelling, and wound separation.
A general agreement that the overlap of mesh with autogenous abdominal tissue needs to be at the very least 3 cm.

34. Mesh placement in relation to fascia
Hawn et al.,
The effectiveness of mesh repair varied by its position.
Compared to suture repair:
open underlay mesh repair (hazard ratio = 0.72) and laparoscopic intraperitoneal repair (hazard ratio = 0.49) significantly reduced the risk of recurrence.
Mesh onlay or inlay had no improvement over primary suture repair.
Rives and Stoppa independently described a method of repairing ventral hernias.
When Rives and Stoppa described their pre-peritoneal reconstruction method only synthetic meshes with a high tendency to erode intra-abdominal organs were available.
Composite synthetic materials have been develop specifically to prevent visceral injury and adhesion formation.
Wiliams et al., demonstrated that the Rives-Stoppa method, could be accomplished intra-peritoneally.
Specifically, they performed open incisional hernia repairs using an intraperitoneal mesh underlay. In their study, the repairs were completed with a variety materials designed to limit visceral erosion including ePTFE, coated polyester, coated polypropylene, and biologic meshes.

35. Component Separation Repairs:
Ramirez et al.
Separating the muscles of the abdominal wall and transposing their position to closure a hernia defect.
Elevation of extensive lateral skin flaps
External oblique muscle is detached from its medial insertion on the rectus sheath along the entire semi-lunar line. T
The external oblique muscle is subsequently elevated off of the internal oblique muscle.
The horizontal translation of the musculature allows for greater approximation of the midline fascial elements.
Additionally, separation of the posterior rectus sheath from the rectus muscle itself may be performed for additional intra-abdominal domain recovery.
De Vries Reilingh et al.
Described the use of this technique for complex ventral hernia repair in both clean and contaminated surgical fields.
Over a 1 to 4 year follow-up period, their work documented a recurrence rate that ranged from 4-30%. Additionally, wound complication (i.e. seroma, surgical site infection, etc.) rates varied from 1-84%.
This variation was owed in part to variation in technique between the studies described. The higher wound complications were owed in part to the subsequent vascular compromise to the overlying skin flaps inherent the extensive surgical dissection.

36. Component Separation Repairs:

37. Questions

38. Question 1
The Shelving portion of the inguinal ligament used for open inguinal hernia repair:
A) is formed from the external oblique aponeurosis
B) Arises from the transversalis fascia
C) Inserts directly on to creamasteric fascia
D) represents the superior border of the iliopubic tract
E) is usually sutured to the transversus aponeurosis arch (flax inguinalis), which lies inferior to it , to complete a primary open repair

39. Question 1
The Shelving portion of the inguinal ligament used for open inguinal hernia repair:
A) is formed from the external oblique aponeurosis
B) Arises from the transversalis fascia
C) Inserts directly on to creamasteric fascia
D) represents the superior border of the iliopubic tract
E) is usually sutured to the transversus aponeurosis arch (flax inguinalis), which lies inferior to it , to complete a primary open repair

40. Question 1
The Shelving portion of the inguinal ligament used for open inguinal hernia repair:
A) is formed from the external oblique aponeurosis
B) Arises from the transversalis fascia
C) Inserts directly on to creamasteric fascia
D) represents the superior border of the iliopubic tract
E) is usually sutured to the transversus aponeurosis arch (flax inguinalis), which lies inferior to it , to complete a primary open repair

41. Question 2 Which is true of the anatomy of the Abdominal Wall:
A) The origin of the external oblique muscle is the 5 lowest ribs
B) Embryologic origin of the Rectus Abdominus is the ectoderm
C) The Majority of the neurovascular structures that supply the abdominal wall lie between the external and internal oblique muscles
D) An abdominal hernia requires a defect in transversus abdominus
E) Lymphatic Drainage of the abdominal wall above the umbilicus goes to the ipselateral axillary lymph nodes.

42. Question 2 Which is true of the anatomy of the Abdominal Wall:
A) The origin of the external oblique muscle is the 5 lowest ribs
B) Embryologic origin of the Rectus Abdominus is the ectoderm
C) The Majority of the neurovascular structures that supply the abdominal wall lie between the external and internal oblique muscles
D) An abdominal hernia requires a defect in transversus abdominus
E) Lymphatic Drainage of the abdominal wall above the umbilicus goes to the ipselateral axillary lymph nodes.

43. Question 2 Which is true of the anatomy of the Abdominal Wall:
A) The origin of the external oblique muscle is the 5 lowest ribs
B) Embryologic origin of the Rectus Abdominus is the ectoderm
C) The Majority of the neurovascular structures that supply the abdominal wall lie between the external and internal oblique muscles
D) An abdominal hernia requires a defect in transversus abdominus
E) Lymphatic Drainage of the abdominal wall above the umbilicus goes to the ipselateral axillary lymph nodes.

44. Question 3
Thirty years after having a right open inguinal hernia repair, a 67 year old man with hypertension presents with new onset bulge in his right groin. The bulge is apparent throughout the day and causes discomfort with valsalva. Five years ago, he had a radical retropubic prostatectomy and open cholecystectomy. On Exam, he has a moderately sized reducible right inguinal hernia. The most appropriate next step in management would be:
A) Open Primary Herniorrhapy
B) Open Mesh Hernioplasty
C) Transabdominal Preperitoneal (TAPP) repair
D) Total Extraperitoneal (TEP) repair
E) Watchful Waiting

45. Question 3 B) Open Mesh Hernioplasty
Thirty years after having a right open inguinal hernia repair, a 67 year old man with hypertension presents with new onset bulge in his right groin. The bulge is apparent throughout the day and causes discomfort with valsalva. Five years ago, he had a radical retropubic prostatectomy and open cholecystectomy. On Exam, he has a moderately sized reducible right inguinal hernia. The most appropriate next step in management would be:
A) Open Primary Herniorrhapy
B) Open Mesh Hernioplasty
C) Transabdominal Preperitoneal (TAPP) repair
D) Total Extraperitoneal (TEP) repair
E) Watchful Waiting

46. Question 3 - SESAP

47. Question 4 A) systemic Corticosteroids
B) Local injection of Corticosteroids
C) Inguinal Exploration
D) Laparotomy
E) Pubic Ramus Plating

48. Question 4 C) Inguinal Exploration A) systemic Corticosteroids
B) Local injection of Corticosteroids
C) Inguinal Exploration
D) Laparotomy
E) Pubic Ramus Plating

49. Question 4 - SESAP

50. Question 5
Which statement about watchful waiting of inguinal hernia is true?
A) More Likely to limit physical activity due to pain
B) More likely to encounter complications if subsequent repair is required
C) Have a 10% chance of incarceration in 2 years time.
D) More cost effective
E) 20% require operative repair in 2 years

51. Question 5 E) 20% require operative repair in 2 years
Which statement about watchful waiting of inguinal hernia is true?
A) More Likely to limit physical activity due to pain
B) More likely to encounter complications if subsequent repair is required
C) Have a 10% chance of incarceration in 2 years time.
D) More cost effective
E) 20% require operative repair in 2 years

52. Question 5

53. Question 6
Which of the following is true regarding patients with liver cirrhosis, ascites, and umbilical hernia.
A) They are best managed non-operatively
B) Ascites is a contraindication to operative repair
C) They have a low recurrence risk
D) They may be categorized by MELD score to predict rate of failure
E) Elective operation is recommended

54. Question 6 E) Elective operation is recommended
Which of the following is true regarding patients with liver cirrhosis, ascites, and umbilical hernia.
A) They are best managed non-operatively
B) Ascites is a contraindication to operative repair
C) They have a low recurrence risk
D) They may be categorized by MELD score to predict rate of failure
E) Elective operation is recommended

55. Question 6

56. Prior Absite ?’s

57. Prior Absite ?’s