Total Abdominal Hysterectomy (TAH) - Complete Guide for NEET PG Residents

Definition

• Subtotal/Supracervical hysterectomy - uterine corpus removed, cervix left in situ
• TAH + BSO - total hysterectomy with bilateral salpingo-oophorectomy
• Radical hysterectomy (Wertheim's) - removes uterus, cervix, upper vagina, parametria, and pelvic lymph nodes

Indications (Clinically Important for NEET PG)

NEET PG Key Point: Hysterectomy is the treatment of last resort for CIN. It is only done when: (1) microinvasion is confirmed, (2) there is histologically confirmed recurrent high-grade CIN after LLETZ/conization, or (3) coexisting gynecologic pathology requiring hysterectomy (fibroids, prolapse). - Berek & Novak's Gynecology

Types of Hysterectomy - Classification (Exam Favorite)

1. Total hysterectomy - uterus + cervix
2. Subtotal/Supracercival hysterectomy - uterus only (cervix preserved)
3. Radical hysterectomy (Wertheim's/Type III) - uterus + cervix + upper 1/3 vagina + parametria + pelvic LN
4. TAH + BSO - adds bilateral salpingo-oophorectomy

• Abdominal (TAH) - open
• Vaginal (VH)
• Laparoscopically-assisted vaginal hysterectomy (LAVH)
• Total laparoscopic hysterectomy (TLH)
• Robotic-assisted hysterectomy

NEET PG Key Point: ACOG recommends preferring vaginal or laparoscopic route over abdominal when feasible (less morbidity, shorter hospital stay). TAH is chosen when: large uterus, expected extensive adhesions, need for concurrent abdominal surgery, or surgeon/patient preference.

Preoperative Workup

• Complete history and examination, Pap smear, endometrial biopsy if indicated
• Pelvic USG (assess uterine size, adnexa)
• CBC, coagulation profile, renal/liver function, urine routine
• Group and crossmatch blood (2 units)
• Informed consent - including permanent sterility, menopause if BSO, bowel/bladder injury risk
• Bowel preparation (usually mechanical bowel prep night before)
• DVT prophylaxis: TED stockings + LMWH
• Antibiotic prophylaxis: single dose IV cefazolin 1g (or metronidazole + gentamicin) at induction
• Foley catheterization before incision
• Patient positioning: supine, Trendelenburg

Anesthesia

• General endotracheal anesthesia (preferred for abdominal approach)
• Combined spinal-epidural (CSE) can be used
• Epidural catheter (T8-T11 level for TAH) for postoperative pain management

Surgical Anatomy - Clinically Critical

Step-by-Step Procedure (TAH)

Incision

• Pfannenstiel (low transverse) - preferred cosmetically, used for benign disease, smaller uteri
• Vertical midline subumbilical - used for malignancy, large uteri, anticipated adhesions, need for lymph node dissection

Step 1 - Enter Abdomen and Exploration

Step 2 - Round Ligament Division

Fig A-B: Division of round ligament and opening of broad ligament leaves. (Sabiston Textbook of Surgery)

Step 3 - Broad Ligament Incision and Bladder Flap

Fig C: Bladder dissection off the lower uterine segment/cervix. (Sabiston Textbook of Surgery)

Step 4 - Adnexal Management (Decision Point)

• Incise posterior leaves of broad ligament on each side
• Identify the ureter by palpation/visualization through the peritoneum (it lies medial and posterior to the IP ligament)
• Doubly clamp the infundibulopelvic (IP) ligament with curved Heaney or Zeppelin clamps
• Divide between clamps with curved Mayo scissors
• Doubly ligate remaining pedicles with 0-Vicryl (specimen side ligated to prevent back-bleeding)

• Two curved Kelly or Heaney clamps placed across the utero-ovarian ligament (ovarian ligament + proximal fallopian tube)
• Divide and doubly ligate
• Salpingectomy can be performed along the mesosalpinx

Fig D-F: Division of ovarian vessels (when BSO), opportunistic salpingectomy, and utero-ovarian vessel division. (Sabiston Textbook of Surgery)

NEET PG Key Point: The ureter must be identified BEFORE clamping the IP ligament. The ureter crosses the common iliac artery at the pelvic brim, then runs along the medial leaf of the broad ligament, and passes under the uterine artery at the level of the internal os ("water under the bridge").

Step 5 - Uterine Vessel Ligation (Critical Step)

• Remaining leaves of posterior broad ligament are incised inferiorly to skeletonize the uterine vessels as they travel along the lateral edge of the uterus
• A curved Heaney or Zeppelin clamp is placed across the uterine vessels perpendicular to the uterus at the level of the internal cervical os
• The pedicle is cut and suture ligated (transfixion stitch with 0-Vicryl)
• The ureter should be identified again at this point as it lies just medial and inferior to where the clamp is placed

NEET PG Key Point: This is the most common step where ureteric injury occurs. The ureter at this point is only about 1-2 cm from the uterine vessels. Always dissect the bladder flap fully and identify the ureter before clamping.

Step 6 - Cardinal and Uterosacral Ligament Division

• Bladder is further dissected completely below the level of the cervix
• A straight Heaney or Zeppelin clamp is placed serially on the cardinal ligaments and uterosacral ligaments bilaterally, in a stepwise fashion, working downward
• Each pedicle is cut and suture ligated
• Continue until both sides are clear of tissue at the level of the external cervical os

Fig G: Cardinal ligament clamping and division. (Sabiston Textbook of Surgery)

Step 7 - Colpotomy and Specimen Excision

• Edges of upper vagina grasped with Allis clamps for visualization
• The uterus and cervix are sent as a single specimen for histopathology

Step 8 - Vaginal Cuff Closure

• Heaney transfixion stitches placed beneath the two angle clamps to ligate vaginal corners
• Vaginal cuff closed with interrupted figure-of-eight sutures or running suture
• The lateral apex sutures incorporate the ipsilateral uterosacral ligament - this provides apical support and prevents future vaginal vault prolapse
• An alternative: running suture, interrupted sutures, or figure-of-eight sutures

Step 9 - Hemostasis Check and Closure

• Inspect all pedicles for hemostasis
• Irrigate pelvis with warm saline
• Count instruments, needles, and swabs (mandatory)
• Peritoneum may be left open (current evidence shows no benefit to closing parietal peritoneum)
• Anterior rectus sheath closed with loop PDS or 1-Vicryl
• Skin closed with subcuticular suture or staples

Clinically Important Points for NEET PG

Ureter Injuries (Most Exam-Important Complication)

• Incidence: 0.5-1% of TAH
• Most common site of injury: At the level of the uterine artery (where ureter passes under the uterine artery - "water under the bridge")
• Second most common site: As ureter enters bladder trigone / near IP ligament
• Types: Ligation, kinking, transection, thermal injury
• Timing of detection: 75% detected intraoperatively (give IV methylene blue or indigo carmine and check for spillage); 25% postoperatively (flank pain, fever, urinary fistula)
• Prevention: Always identify ureters bilaterally before each clamping step

Other Intraoperative Complications

Postoperative Complications

NEET PG Key Point on Fistulas: VVF (vesico-vaginal fistula) after TAH typically presents 10-21 days postoperatively with continuous painless leakage of urine per vaginum. Ureterovaginal fistula presents similarly. 3-dye test or cystoscopy can differentiate. The "3-swab test" with oral phenazopyridine + intravesical methylene blue helps localize the fistula level.

Menopause After Hysterectomy

• TAH alone (ovaries preserved): no menopause; ovaries continue functioning
• TAH + BSO: immediate surgical menopause; HRT should be discussed for women <50 years
• Ovaries conserved in TAH may fail earlier due to disruption of blood supply (ovarian blood supply partly from uterine artery via utero-ovarian anastomosis)

Opportunistic Salpingectomy

• Strongly recommended at time of hysterectomy when ovaries are conserved
• Evidence shows most "ovarian" high-grade serous carcinomas actually originate in the fallopian tube (fimbrial end)
• Salpingectomy at TAH reduces lifetime risk of ovarian cancer without increasing surgical morbidity

Route Selection (TAH vs VH vs TLH)

Contraindications to TAH (or favoring other routes)

• Significant uterovaginal prolapse (vaginal route preferred)
• Patient desires fertility preservation (consider myomectomy instead)
• Very small uterus with good vaginal access (vaginal or laparoscopic preferred)

Key Sutures and Instruments Used

High-Yield NEET PG Summary Points

1. TAH = uterine corpus + cervix removed (vs subtotal = corpus only)
2. Most common injury in TAH = ureter (passes under uterine artery at internal os)
3. Second most common = bladder (during bladder flap creation)
4. VVF after TAH presents at 10-21 days postoperatively
5. Round ligament is the FIRST structure divided in TAH
6. Bladder flap must be fully developed before ligating uterine vessels
7. Uterine artery ligated at level of internal os - always identify ureter first
8. Cardinal ligament = Mackenrodt's ligament - main uterine support
9. Uterosacral ligaments incorporated in vaginal cuff closure for apical support
10. TAH + BSO → immediate surgical menopause (discuss HRT for women <50 years)
11. Opportunistic salpingectomy recommended when conserving ovaries (reduces ovarian cancer risk)
12. Anesthesia level for TAH: T8-T11 (epidural) - as per Miller's Anesthesia
13. Antibiotic prophylaxis: Single dose cefazolin at induction
14. DVT prophylaxis: Mandatory (LMWH + TED stockings)
15. IP ligament contains ovarian artery and vein - ureter runs medial/below it