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I notice the query is quite broad - "LSCS" could mean the user wants a general overview or something specific. Let me check what aspect to focus on, but since enough content has been gathered from Creasy & Resnik's Maternal-Fetal Medicine, I'll provide a comprehensive answer.

LSCS - Lower Segment Caesarean Section

Definition

LSCS (Lower Segment Caesarean Section) is the delivery of a fetus through a surgical incision in the lower uterine segment. It is the standard and most commonly performed type of caesarean delivery worldwide, having largely replaced the classical (upper segment) incision.
The lower segment incision was a key innovation because it allows the uterine wound to be excluded from the peritoneal cavity, dramatically reducing the risk of postoperative peritonitis and puerperal endometritis.
  • Creasy & Resnik's Maternal-Fetal Medicine, p. 958

Indications

Caesarean delivery is indicated any time delivery must be accomplished and vaginal delivery (induction, trial of labor, or spontaneous birth) carries greater risk to the mother or fetus than abdominal delivery. Four indications account for approximately 90% of all C-sections:
IndicationDetails
DystociaIncludes CPD (cephalopelvic disproportion) and failure of labor to progress - accounts for ~30% of increase in C-section rates
Repeat caesareanPrior uterine scar; risk of uterine rupture with VBAC
Breech presentationFootling/complete/frank breech at term
Fetal distressNon-reassuring CTG / fetal heart rate patterns; accounts for 10-15% of increase
Other indications include:
  • Placenta praevia (absolute indication - vaginal delivery risks exsanguination of mother and fetus)
  • Placental abruption (severe cases)
  • Cord prolapse
  • Failed induction in severe pre-eclampsia
  • Multiple pregnancy (certain presentations)
  • Genital herpes simplex infection (to prevent vertical transmission)
  • Fetal abnormalities (spinal or abdominal wall defects)
  • Severe IUGR with abnormal Doppler studies
  • Maternal request (in absence of standard indications - controversial)
  • Creasy & Resnik's, p. 962

Surgical Steps (Standard Technique)

  1. Patient positioning - supine with left lateral tilt (to relieve aortocaval compression)
  2. Skin incision - Pfannenstiel (transverse suprapubic) is most common; midline vertical for emergency/obese patients
  3. Entry into peritoneal cavity - layers incised: skin, fascia (Sheath of rectus abdominis), rectus muscles separated, parietal peritoneum opened
  4. Lower uterine segment exposure - vesico-uterine peritoneum (bladder flap) reflected downward to expose lower segment
  5. Uterine incision - transverse lower segment incision (Joel-Cohen or Kerr technique)
  6. Delivery of baby - head or presenting part delivered; oxytocin 5-10 IU IV given immediately after delivery
  7. Placental delivery - controlled cord traction; uterus exteriorized or in-situ repair
  8. Uterine closure - 1 or 2 layers of absorbable suture
  9. Abdominal closure - peritoneum (optional), fascia, subcutaneous tissue, skin

Anaesthesia

  • Spinal anaesthesia - most commonly used; fast, reliable, avoids general anaesthesia risks
  • Epidural - preferred if epidural already in situ for labor
  • Combined spinal-epidural (CSE) - for anticipated long procedures
  • General anaesthesia - reserved for emergencies when regional is contraindicated or fails

Classification by Urgency

GradeDescriptionDecision-to-delivery interval
Grade 1 (Crash/Emergency)Immediate threat to life of mother or fetus30 minutes
Grade 2 (Urgent)Maternal/fetal compromise, not immediately life-threatening75 minutes
Grade 3 (Scheduled)No compromise, but early delivery neededWithin hours
Grade 4 (Elective)At a time to suit patient and teamPlanned

Maternal Complications

Intraoperative (~2% of cases):
  • Hemorrhage (most common)
  • Bladder injury (10x more common than in operative vaginal delivery; 1-2 per 1000)
  • Bowel injury (especially with adhesions from prior surgery)
  • Anesthesia accidents (aspiration, failed intubation, drug reactions)
  • Amniotic fluid embolism (rare but life-threatening)
  • Air embolism
Postoperative:
  • Endomyometritis / wound infection
  • Urinary tract infection
  • Atelectasis
  • Wound hematoma, dehiscence, necrotizing fasciitis
  • Thromboembolic disease (DVT/PE)
  • Ileus
  • Urinary retention
Long-term / future pregnancy risks:
  • Uterine scar with risk of rupture in subsequent labors
  • Placenta praevia / accreta spectrum in future pregnancies (risk rises with each CS)
  • Adhesion formation
  • Creasy & Resnik's, p. 959-960

Neonatal Considerations

  • Neonates born by CS (especially elective pre-labor) have higher rates of respiratory morbidity - transient tachypnoea of the newborn (TTN) and respiratory distress syndrome (RDS) - due to lack of the labor-associated catecholamine surge and chest compression
  • Risk of iatrogenic prematurity if gestational age is miscalculated
  • Altered microbiome colonization compared to vaginally born infants

VBAC (Vaginal Birth After Caesarean)

  • Uterine rupture risk in a scarred uterus during labor is approximately 0.5-1% for low transverse scar
  • Classical (upper segment) scar carries much higher rupture risk - trial of labor generally contraindicated
  • Success rate of VBAC attempt is ~60-80% in appropriately selected patients
  • Requires continuous electronic fetal monitoring and ready access to emergency CS

Global C-Section Rates

  • WHO recommended rate: 10-15% of births (beyond which no improvement in outcomes is seen)
  • USA: ~32% (2023)
  • UK: ~30%
  • Brazil/Chile: among the highest globally, with rates in private sector exceeding 80-90%
  • Creasy & Resnik's, p. 958-959
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