SURGERY: LIVER ANATOMY Flashcards
Functional Segments of Liver are known as
Couinaud segment
Cantlie’s line
Cholecysto-Caval line
Imaginary line joining the IVC and GALL BLADDER
Which vein lies below Cantlie’s line
Middle Hepatic Vein
Couinaud segments
🧠⚡Start from A(1) in clockwise direction ⚡
🧠⚡All Longitudinal divisions are formed by HEPATIC VEINS ⚡
🧠⚡Remember H not with H ⚡
🧠⚡All Horizontal divisions are formed by PORTAL VEINS⚡
Left hemi liver: 4A, 2, 3, 4B
Right Hemi Liver: 5 6 7 8
Left Hemiliver is divided into
⭐ Divided by
⭐ Divided by : Left Hepatic Vein
Left Medial
Left Lateral
⭐ Divided by : Left Portal Vein
Left Superior
Left Inferior
Vein that lies below Falciform ligament
Left Hepatic Vein
Right Hemiliver division
⭐ Divided by :
⭐ Divided by : Right Hepatic Vein
Right Anterior
Right Posterior
⭐ Divided by : Right Portal Vein
Right Superior
Right Inferior
Right Hemiliver division
⭐ Divided by :
⭐ Divided by : Left Hepatic Vein
Left Medial
Left Lateral
⭐ Divided by : Left Portal Vein
Left Superior
Left Inferior
SINGLE BEST ANSWER for STRUCTURE DIVIDING LIVER INTO FUNCTIONAL SEGMENTS
Portal Veins
Other: Hepatic vein
Major FISSURES of LIVER are
⭐ site of 3 Major Hepatic Veins
Right
Middle
Left
Minor Fissures in Liver
Formed by PORTAL VEINS
1. Right Portal vein
2. Left Portal vein
3. Fissure of Ganz
Sectors of Liver
- Right Posterior
- Right Anterior
- Left Lateral
- Left Medial
Which sectors form the GALL BLADDER FOSSA
4B and 5
Which segments are removed in RADICAL CHOLECYSTECTOMY
Segment 4B and 5
Bare area of Liver corresponds to which Segment
Segment 7
⚡⚡ MOST COMMON segment of Lover affected by Amoebic Liver Abscess
Segment 7
Caudate Lobe: Segment
Quadrate Lobe: Segment
Caudate Lobe: Segment 1
Quadrate Lobe: Segment 4
Caudate Lobe
Special Features
⭐ Recieves Blood from Both sides
⭐ Drains BILE into Both sides
⭐ Directly drains to IVC
Majority of Caudate Lobe lies
Toward Left side of IVC
CAVAL LIGAMENT
Formed by?
Function?
⭐ 50% of Caudate Lobe encircles the IVC ➡️ known as CAVAL Ligament
⭐ Mobilising the LIVER during Liver Resection
Segment 1 is divided into
- Segment 9
- Spigelian lobe
Which segment is INVOLVED EARLY in CHOLANGIOCARCINOMA
Segment 1
Which segment undergoes HYPERTROPHY in BUDD CHIARI Syndrome
Segment 1
(Direct connection with IVC)
Mickey Mouse SIGN on Duplex Scan
Seen in
- Liver Pedicle
- Varicose veins at Sapheno-femoral junction
Mickey Mouse in Medicine
- Mickey Mouse Pelvis
- Mickey Mouse Sign
- Mickey Mouse Cast
- Mickey Mouse Sign on Duplex Scan
- Mickey Fenn
- Mickey Mouse Pelvis
⭐ Down Syndrome (Outward flaring of Iliac Wings) - Mickey Mouse Sign
⭐ Paget’s disease (⬆️ Radiotracer uptake in Bone scan of pedicles and spinous process of Vertebra)
⭐ Anencephaly
⭐ Progressive Supra nuclear Palsy
⭐ Hutch Diverticulum: IVU/CT - Mickey Mouse Cast
⭐ Dysmorphic RBC Cast in Glomerular Hematuria - Mickey Mouse Sign on Duplex Scan
✨ Liver Pedicle
✨ Varicose veins at Sapheno-femoral junction - Mickey Fenn
⭐ Chloral hydrate ➕ Alcohol
Liver Pedicle
🧠⚡Ant ➡️ Post: DAVE ⚡
⭐ Ducts ( Rt and Left Hepatic Duct)
⭐ Artery ( Rt and Left Hepatic Artery)
⭐ Vein
⭐ Epiploic Foramen of Winslow
Rouvier’s Sulcus
🧠⚡ROG ⚡
Fissure of Ganz
Pringle’s maneuver
Compressing the Liver Pedicle at the FREE EDGE of Lesser Omentum (OR) FORAMEN of Winslow
⬇️
Helps to control Bleeding in Liver
Helps to Detect Source of Bleeding
Blood Supply of Liver
80%: Portal Vein
20%: Hepatic Artery
Which Hepatic Artery is Larger?
Right HEPATIC ARTERY
Segments removed
⭐ Left Trisectorectomy
⭐ Right Trisectorectomy
⭐ Left Trisectorectomy (Extended Left Hepatectomy)
4A, 4B, 2, 3, 5, 8
⭐ Right Trisectorectomy (Extended Right Hepatectomy)
5,6,7,8, 4A,4B
Posterior Relations of Liver
Space of Disse
Contains?
Area between Hepatocyte and Sinusoid
Contains:
1. Ito cells
2. Microvilli of adjacent hepatocytes
3. Fine collagen Fibers (type 3)
Cells that store Vitamin A in LIVER
Ito cells
(OR)
Hepatic STELLATE Cells
Origin of Ito cells
Mesenchymal cells
The 2 states of Ito cells
- Dormant state: Store Vitamin A
- Active state: Get activated by LIVER INJURY and replace damaged Hepatocytes with collagenous scar tissue ➡️ Fibrosis
Cells responsible for FIBROSIS in Cirrhosis
Ito cells
Lymph produced in the liver is drained by
- Peri sinusoidal Space of DISSE
- Peri Portal cleft of Mall
Porta Hepatis
⭐ STRUCTURES Entering at PORTA HEPATIS
⭐ STRUCTURES Exiting at PORTA HEPATIS
Deep Transverse Fissure that is situated on the INFERIOR SURFACE of RIGHT LOBE of LIVER
STRUCTURES Entering at PORTA HEPATIS
1. HEPATIC ARTERY
2. PORTAL VEIN
3. HEPATIC NERVOUS PLEXUS
STRUCTURES Exiting at PORTA HEPATIS
1. Bile Duct Lt and Right
2. Lymphatics
Fibrous sheath that surrounds Duct, Hepatic artery, Portal Vein in each Liver Segment is known as
Valoean sheath
Valoean sheath is a continuation of
Glisson’s capsule
Glisson in medicine
Use of VALOEAN SHEATH
Facilitate surgical control of Right and Left Vasculo-biliary pedicles of Liver