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14.6 Haemostasis ontheRaw Surface oftheRemnant Liver
Fig. 14.28 Kousnetzoff and Pensky technique
149
Fig. 14.29 Wendel technique
150
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Fig. 14.30 Auvray chain ligature
14 Liver Transection Techniques andHaemostasis ontheRaw Surface oftheRemnant Liver
Fig. 14.31 Suturing techniques after Wedge resection of the liver
14.6 Haemostasis ontheRaw Surface oftheRemnant Liver
151
Fig. 14.32 Using both hands to compress on the edges of the lacerated liver to decrease bleeding
152
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14 Liver Transection Techniques andHaemostasis ontheRaw Surface oftheRemnant Liver
Fig. 14.33 Suturing liver lacerations using. (a) Simple stitches. (b) Horizontal mattress sutures
14.6 Haemostasis ontheRaw Surface oftheRemnant Liver
153
Fig. 14.34 In difcult cases of lacerated liver, suturing of laceration over a guard of Surgicel
Fig. 14.35 Interlocking stitches to reinforce the laceration edge followed by simple sutures to approximate the lacerated edges
154
c
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14 Liver Transection Techniques andHaemostasis ontheRaw Surface oftheRemnant Liver
ab
def h
Fig. 14.36 Robinson and Butcher suturing technique
Further Reading
Castaldo ET, Pinson W. Chapter 24: Techniques of liver transection.
In: Lau WY, editor. Hepatocellular carcinoma. Singapore: World Scientic; 2008. p.529–49.
Jiao LR, Habib NA.Chapter 25: Radiofrequency-assisted liver resec-
tion. In: Lau WY, editor. Hepatocellular carcinoma. Singapore: World Scientic; 2008. p.441–567.
Lau WY. The history of liver surgery. Roy Coll Surg Edinb.
1997;42:303–9.
Xia F, Lau WY, Mak S, Bie P. Modied conventional clamp-crushing
technique in liver parenchymal transection. Hepatobiliary Pancreat Dis Int. 2012;11:442–5.
Different Approaches toLiver Resection
15
With better understanding of surgical anatomy, physiology and regeneration of the liver, and with improvements in tech­nical developments in liver resection, alternative methods of approaches to liver resection evolved.
To make things simple, there are only ve steps in liver resection before the resected specimen can be removed from the patient, and they are mobilisation of the liver by division of ligaments, interruption of the vasculo-biliary inow, liver parenchymal transection, interruption of the venous outow from the short hepatic veins and from the main hepatic veins. Obviously, adequate haemostasis is required before the abdo­men is closed. The alternative approaches in liver resection involve the combination of these ve steps in different orders. To complicate matters, the interruption of the vasculo- biliary inow can be at a different site and level from the actual liga­tion and division of the vasculo-biliary inow branches (e.g. Pringle’s manoeuvre at porta hepatis with intrahepatic divi­sion of the individual branches). Similarly, the outow con­trol can be at a site and level different from the division and ligation of the hepatic veins (e.g. extrahepatic control of the right hepatic vein with a vascular sling coupled with intrahe­patic division and ligation of the vein). Furthermore, the alter­native approaches also involve the division and ligation of the Glissonian pedicle with all its portal triads together, or the individual ligation and division of the hepatic arterial branch, the portal venous branch and the biliary branch separately.
right hepatic duct are ligated and divided extrahepatically (Fig.15.1). The right liver is then dissected from the inferior vena cava. Short hepatic veins that drain from the right liver into the inferior vena cava are ligated and divided (Fig.15.2a,
b). The hepato-caval ligament is then divided between
clamps and ligated. The right hepatic vein is dissected extra­hepatically (see Sect. 13.6.1) divided and sutured (Fig.15.2c). A line of demarcation is seen marking the devascularised right liver from the left liver (Fig.15.3). Liver parenchymal transection can then be done, transecting the liver on the right border of the middle hepatic vein. Occasionally, the transection line of a right hepatectomy can be along the left border of the middle hepatic vein. Under this situation, care must be taken to preserve the segment 4 branch or the liver segment 4 would become congested (see Fig.15.4).
The segment 8 and segment 5 branches of the middle
hepatic vein need to be ligated intrahepatically and divided.
Blood loss during parenchymal transection can be decreased by the use of Pringle’s manoeuvre and a low cen­tral venous pressure (see Chap. 12). Instead of using low cen­tral venous pressure, the trunk of the middle and the left hepatic veins can also be controlled with a clamp extrahepati-
15.1 Conventional Approach
This is the approach used by Lortart-Jacob and Robert for their rst successful right hepatectomy reported in 1953.
15.1.1 Right Hepatectomy
This approach starts with mobilisation of the right liver by division of the falciform, coronary and right triangular liga­ments. The right hepatic artery, the right portal vein and the
© Springer Nature Singapore Pte Ltd. and People’s Medical Publishing House Co. Ltd. 2021 W. Y. Lau, Applied Anatomy in Liver Resection and Liver Transplantation, https://doi.org/10.1007/978-981-16-0800-1_15
Fig. 15.1 Dissection and slinging of the right hepatic artery (red sling), right portal vein (blue sling) and right hepatic duct (yellow sling)
155
156
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15 Dierent Approaches toLiver Resection
a
b
c
Fig. 15.2 (a) Short hepatic veins and right hepatic vein from the right liver draining into the inferior vena cava. (b) Isolation of a short hepatic vein prior to ligation and division. (c) Isolation of the right hepatic vein before ligation and division
cally to prevent blood loss during parenchymal transection (selective hepatic vascular exclusion). The dissection of the trunk of the middle and left hepatic veins can be facilitated by the division of the ligamentum venosum near to its termina­tion at the trunk of the hepatic veins (see Sect. 13.6.1). Once the ligamentum venosum is divided, the trunk can be dis­sected and looped with a vascular sling (see Sect. 6.10).
15.1.2 Left Hepatectomy
The procedure is similar to right hepatectomy with mobilisation of the left liver by division of the falciform and left triangular ligaments. Extrahepatic branch of the hepatic artery, left portal
Fig. 15.3 Line of demarcation between right and left livers after the division of blood inow and outow to right liver
vein and left hepatic duct are divided and ligated extrahepati­cally. The trunk of the middle and left hepatic veins are isolated
MHV
RHV
sacrificing middle hepatic vein
Cantlie’
15.2 Parenchymal Transection withEarly Intrahepatic Control ofGlissonian Sheath
157
and slung. Parenchymal transection is along the plane demar­cated by the ischaemic left liver along a plane on the left side of the middle hepatic vein. The left hepatic vein is ligated intrahe­patically. Again, blood loss can be reduced by using Pringle’s manoeuvre plus either low central venous pressure or selective hepatic vascular exclusion by clamping the right hepatic vein as well. Please note that there is no short hepatic vein that drains from the left liver (segments 2, 3, 4) to the inferior vena cava.
15.1.3 Extended Right Hepatectomy (Right Trisectionectomy)
This is similar to carrying out right hepatectomy with the exception that the hepatic arterial, portal venous and bile ducts branches to segment 4 are also divided extrahepati­cally, and the right and middle hepatic veins are divided, leaving behind the portal triad supplying the left lateral sec­tion and the left hepatic vein.
15.1.4 Extended Left Hepatectomy (Left Trisectionectomy)
This is similar to carrying out left hepatectomy, with the exception that the hepatic arterial, portal venous and bile duct to the right posterior section, and the right hepatic vein
LHV
Sg 8 br
are preserved, and the additional resection of the right ante­rior section. If the right inferior hepatic vein is large (see Sect. 7.4) this vein should be preserved, or the venous drain­age to segment 6 can be affected.
15.2 Parenchymal Transection withEarly Intrahepatic Control ofGlissonian Sheath
15.2.1 Anterior Approach
This approach starts off with liver parenchymal transection of the liver. This procedure is commonly accompanied by temporary control of the portal triad using Pringle’s manoeu­vre and low central venous pressure. Occasionally, liver parenchymal transection can proceed with minimal blood loss using some of the technical devices described in Chap.
14 without Pringle’s manoeuvre. Vascular inow control can
soon follow parenchymal transection by early intrahepatic approach to, and control of, the hepatic pedicle structures which are contained within the Glissonian sheath (Fig.15.5). Further parenchymal transection and intrahepatic control of vessels follow until the parenchymal transection is complete. This is then followed by ligation and division of the hepatic venous branches, which include one or two of the major hepatic veins and the short hepatic veins (Fig. 15.6). Mobilisation of the falciform, coronary and triangular liga­ments completes the resection and removal of the specimen.
The benecial effects of the anterior approach are there is less blood loss compared with the conventional approach, there is less chance of disseminating the tumour as a result of less manipulation on the tumour, there is less compromised blood ow to the remnant liver as a result of less kinking of the remnant liver during mobilisation, and there is less chance of rupturing the tumour when the tumour is large.
Sg 4 br
Sg 5 br
b
a
transection line of right hepatectomy preserving middle hepatic vein
transection line of right hepatectomy
Fig. 15.4 Line of parenchymal transection for right hepatectomy
s line
Right hepatic
pedicle
Fig. 15.5 Right hepatectomy using the anterior approach
158
Right hepatic vein
Right hepatic vein
15 Dierent Approaches toLiver Resection
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Inferior vena cava
iddle
Middle
epatic vein
hepatic vein
Fig. 15.7 Belghiti’s liver hanging technique transecting the liver at the mid plane
Fig. 15.6 Right hepatectomy using the anterior approach. Please note the completion of parenchymal transection before control of the venous structures (the right hepatic vein and the short hepatic veins) at the black of the liver
There are some limitations to the anterior approach. Some patients with a large tumour compressing a major hepatic vein can develop venous collaterals. In these patients, paren­chymal transection without prior mobilisation of the liver is associated with massive bleeding from the venous collater­als. In such situation, after inow clamping, the outow should be resumed by mobilisation of the liver with an upper traction on the liver to facilitate venous ow into the inferior vena cava.
Nagasue in 1985 advocated the additional clamping of the hepatic vein draining the part of the liver being resected, claiming there to be less blood loss during resection than when the Pringle’s manoeuvre is used in isolation. However, this procedure requires early mobilisation of the liver, thus defeats the original purpose of the anterior approach: paren­chymal transection to get early inow occlusion, then further parenchymal transection, followed by outow occlusion and mobilisation of the ligaments.
15.2.1.1 Belghiti’s Liver Hanging Technique
Belghiti proposed a liver hanging technique to facilitate the anterior approach.
The idea is to put a sling between the back of the liver and the front of the inferior vena cava at the ‘avascular tunnel’ (see Sect. 3.3) right at the back of the midplane of the liver (Fig.15.7).
Intraoperative ultrasound is used to conrm the absence of tumour inltration and abnormal short hepatic veins at the 10–11 O’clock position of the anterior surface of the retrohe-
patic inferior vena cava. After opening the anterior leaf of the coronary ligament and the anterior part of the right triangular ligament (to expose the anterior and left sides of the right hepatic vein), the fossa located between the right hepatic vein and the middle hepatic vein is dissected 3–4cm down­wards with a right-angled dissector (Fig. 15.7). For caudal retrohepatic dissection, the caudal edge of the caudate lobe is lifted from the inferior vena cava (Fig. 15.8a), and small short hepatic veins are divided and ligated up to the level of the inferior right hepatic vein. A long, tight, curved aortic clamp is inserted behind the caudate lobe just to the left side of the inferior right hepatic vein and is passed cranially along the anterior surface of the inferior vena cava between the 10 and 11 O’clock positions, identifying the position of the clamp tip by ultrasonography. By successfully opening and closing the clamp, the clamp is directed towards the previ­ously dissected space between the right hepatic vein and the middle hepatic vein, while the clamp tip reaches suprahe­patically (Fig.15.8b). A 10mm-wide soft silicon multitubu­lar drain is seized with the clamp and pulled down through the retrohepatic space (Fig.15.8c). When the right hepatec­tomy includes the middle hepatic vein, the tap is switched from the right to the left side of the middle hepatic vein; this allows safer dissection of the middle hepatic vein near the vena cava conuence. The caudate lobe is divided to place the tap near the right portal pedicle. The tap pulls up the liver, thus facilitated the anterior approach by pulling the liver tis­sue away from the inferior vena cava and protecting it from injury during transection (see Fig.15.8d).
The Belghiti’s hanging technique has a success rate of 80–92%. Adhesions between the liver and the inferior vena cava and direct tumour involvement are the main causes of failure. In 4–6% of cases, major bleeding happens because of torn short hepatic veins.
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