Modified hanging manoeuvre facilitates inferior vena cava resection and reconstruction during extended right hepatectomy: A technical case report

  • Authors:
    • Shamir O. Cawich
    • Dexter A.W. Thomas
    • Vindra Ragoonanan
    • Chunilal Ramjit
    • Dylan Narinesingh
    • Vijay Naraynsingh
    • Neil Pearce
  • View Affiliations

  • Published online on: July 28, 2017     https://doi.org/10.3892/mco.2017.1352
  • Pages: 687-692
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Abstract

Liver resections are safe when performed by specialized hepatobiliary teams. However, complex liver resections are accompanied by significant perioperative risk and they may require modifications of the conventional surgical techniques. We herein report the case of a 54‑year‑old male patient who underwent an extended right liver resection with en bloc resection and reconstruction of the inferior vena cava. For this complex resection, a modification of the standard operative technique was required. A modified hanging manoeuvre was performed using two 19Fr nasogastric tubes outside the traditional avascular plane to facilitate resection. This modification of the hanging manoeuvre was proven to be feasible and safe, and it is recommended for inclusion in the armamentarium of hepatobiliary surgeons when complex resections are required.

Introduction

Liver resections are feasible and safe procedures when performed by specialized hepatobiliary teams (1). However, in certain, more complex cases, applying techniques such as the liver hanging manoeuvre may be required (2). In addition, when there is compression or malignant invasion of the inferior vena cava (IVC) by hepatic tumours, as indicated by preoperative radiological imaging (3,4), the associated perioperative morbidity and mortality increase. In order to mitigate these risks and safely perform complex resections, modifications of the conventional liver resection techniques become necessary. We herein report the technical modifications of the classic hanging manoeuvre used in a patient with colorectal liver metastasis (CRLM) who required an extended right hepatectomy with en bloc resection and reconstruction of the IVC.

Case report

A 54-year old man presented 3 years after right hemicolectomy for a caecal carcinoma with an asymptomatic CRLM in the right liver. The patient had completed 8 cycles of adjuvant systemic treatment with leucovorin, flourouracil and oxaliplatin (FOLFOX regimen) after the index right hemicolectomy. After CRLM was detected on surveillance computed tomography (CT) scans, 3 courses of second-line bevacizumab-based systemic therapy were administered. There was minimal demonstrable response, so the patient was referred to the hepatobiliary team for evaluation.

On CT scans, a solitary 25.4-cm CRLM was identified in the right hemi-liver extending into SIV. There was suspected caval invasion on CT scans, as evidenced by distortion of the upper IVC and loss of the plane at the posterior liver surface (Figs. 1 and 2). Although the CRLM completely encased the right hepatic vein and appeared to involve the middle hepatic vein, the left hepatic vein remained uninvolved and the hilar structures were tumour-free.

A decision was made to proceed with extended right hepatectomy, with planned resection and reconstruction of the IVC. The abdomen was accessed using an upper midline incision with transverse extension. The line of parenchymal transection was identified using intraoperative ultrasound to select a plane that was clear of the margins of the tumour. The CRLM occupied the entire right upper quadrant (Fig. 3), effectively precluding visualization of diaphragmatic attachments. Without being able to mobilize the right liver for conventional resection, transection via the anterior approach without prior mobilization was considered, which would require a hanging manoeuvre to be executed safely. The classic hanging manoeuvre involves lifting the liver with a tape passed along the avascular plane at the 10–11 o'clock position over the IVC (2). In this case, preoperative scans suggested that this avascular plane was involved by the tumour. Therefore, blind passage of an instrument in this plane would be likely to cause torrential bleeding and breach the tumour, preventing R0 resection.

Instead, a modification of the classic hanging manoeuvre was used. Initially, the left hepatic vein junction was dissected out superiorly to establish access. A DeBakey vascular clamp was then passed over the anterior surface of the retro-hepatic IVC at the 2–3 o'clock position, directing it cephalad to exit at the left side of the left hepatic vein. This facilitated passage of a 20Fr nasogastric tube posteromedially behind the liver. Traction on this nasogastric tube anteriorly and to the left allowed partially lifting the liver with the heavy CRLM off the IVC. This allowed passing a second DeBakey clamp over the IVC at the 1 o'clock position with less resistance. The second instrument was directed between the middle and left hepatic veins, and was used to pass a second nasogastric tube in that plane (Fig. 4). The cephalad end of the second nasogastric tube was tied to our Omnitract® retractor and the surgeon pulled on the caudal end to provide controlled traction (Fig. 5).

This allowed performing an anterior transection of the hepatic parenchyma at the line previously selected with intraoperative ultrasound, guided down to the uninvolved IVC surface with controlled traction on the nasogastric tube. Once anterior transection was complete, the point of tumour invasion into the IVC was visualized (Fig. 6). The anterior wall of the IVC was invaded by the tumour for 5–6 cm in length and 25% of its diameter. The IVC was controlled with side-biting Satinsky clamps and the IVC wall was resected en bloc with the tumour to achieve 3–5-mm margins. The IVC was reconstructed primarily with 4/0 PDS sutures, resulting in narrowing to approximately 2/3 of its original diameter (Fig. 7).

After the parenchymal transection and IVC repair were completed, the operation proceeded in a conventional manner. The right liver was mobilized by dividing the right triangular and coronary ligaments under direct visualization. The right hepatic pedicle was dissected and ligated using 3/0 polypropylene sutures. The right liver was then removed from the abdomen.

The operation was completed uneventfully in 315 min. The total blood loss was estimated to be 1,100 ml and the patient required transfusion of two units of packed cells intraoperatively. The postoperative recovery was also uneventful. The patient remained in the high dependency unit for 48 h. The remaining recovery was uneventful and he was discharged from the hospital on the tenth postoperative day.

Histopathological assessment of the specimen confirmed CRLM with malignant invasion of the IVC. The parenchymal resection margins were clear of tumour. The tumour had invaded into the IVC, but the caval resection margins were histologically clear (Fig. 8).

Written informed consent was obtained from the patient regarding the publication of this case report and accompanying images.

Discussion

Malignant invasion of the IVC is difficult to predict on preoperative imaging, as it is a low-pressure vessel that may easily be compressed by hepatic tumours (3,4). The radiological criteria predictive of malignant invasion include: Longitudinal IVC indentation for >50 mm, transverse compression of >50% of the IVC circumference, lesions protruding into the IVC lumen, and the presence of well-developed collaterals (4). Maeba et al (4) reported that the presence of ≥1 of these radiological criteria may predict malignant IVC invasion with 60% overall accuracy. Using these criteria, IVC invasion was anticipated in our patient, since there was compression of >50% of the transverse IVC diameter and >5 cm longitudinal IVC compression. Endoscopic ultrasonography may have added to the preoperative assessment of malignant IVC invasion (5), but it was unavailable.

Despite malignant IVC invasion, an aggressive attempt was made at R0 margin clearance, as IVC resection and reconstruction is currently considered to be potentially curative when it results in histologically clear margins (3,4,68). In these cases, the conventional techniques for liver resection may not be feasible. The conventional technique involves complete mobilization of the right liver in order to approach the IVC and to control the hepato-caval junction prior to parenchymal transection (9). Mobilization was not possible in the present case, as the large CRLM precluded visualization and dissection of the right triangular and coronary ligaments. It would also have been ill-advised from an oncological standpoint, as there is a risk of tumour rupture and seeding with the force that would be applied to mobilize a fixed and non-compliant liver heavily infiltrated with tumour. Therefore, two techniques were utilized for resection: The hanging manoeuvre and anterior parenchymal transection.

Ozawa (10) described the anterior transection technique in 1990. This technique was popularized over the next decade (1115), driven by the perceived disadvantages of conventional right liver mobilization, namely impaired hepatic blood flow with rotational displacement of the liver (10), potential avulsion of hepatic veins (13), iatrogenic tumour rupture (13,16), and hematogenous dissemination of malignant cells when the hepatic veins remained patent (1619).

Liu et al (13) were the first to evaluate this in a prospective randomized trial, in which 120 patients undergoing major resections were randomized to hepatectomy via the anterior or the conventional approach. The authors did not include any patients with IVC invasion, but there were caudate resections in 7 patients with conventional and in 4 patients with anterior transection. There were no attempts at the hanging manoeuvre in that study. There was a statistically significant reduction in the number of patients with massive blood loss >2 l (8.3 vs. 28.3%; P=0.005), reduced transfusion requirements (0 vs. 0.3 l; P=0.001) and better median survival (68.1 vs. 22.6 months; P=0.006) with the anterior vs. conventional transection technique, respectively. However, Capussotti et al (20) prospectively randomized 65 patients undergoing right hepatectomy via the conventional or anterior approach, excluding patients with caudate lobe involvement (n=9) or IVC invasion (n=3). Although the authors routinely attempted the hanging manoeuvre, it was only completed in 30/33 patients in the anterior transection group, being abandoned due to adhesions (n=2) or major bleeding (n=1), and they could not demonstrate any significant advantage with the anterior vs. the conventional approach in terms of overall blood loss (437 vs. 500 ml, respectively; P=0.960), perioperative transfusion rates (18 vs. 9.3%, respectively; P=0.253) or perioperative mortality (P=0.746). Thus, Capussotti et al (20) did not support routine use of the anterior approach.

Due to the conflicting data, Li et al (16) performed a meta-analysis of 807 patients across 2 prospective randomized trials (13,20), plus an additional 6 non-randomized controlled trials (11,12,2124) comparing 444 patients undergoing conventional right hepatectomy to 363 undergoing right hepatectomy via anterior transection. The authors reported that the anterior approach resulted in significant reductions in transfusion rate (35 vs. 57.3%; P<0.01), mortality (1.9 vs. 7.4%; P<0.01) and local recurrence (48.9 vs. 62.9%; P<0.01; odds ratio=0.57; 95% confidence interval: 0.37–0.87). Although existing data lean towards the anterior approach, there are currently insufficient high-quality data to determine which is the optimal method for right hepatectomy. It is clear, however, that hepatobiliary surgeons should be familiar with the anterior transection technique as a part of their armamentarium. In the present case, the anterior transection technique was deemed necessary as i) the bulky right liver could not be mobilized by the conventional technique and ii) the point of malignant IVC invasion could be approached in a controlled manner in preparation for resection.

The hanging manoeuvre was also utilized in order to guide the line of transection and control bleeding from deep parenchymal vessels. Several investigators have reported good outcomes when they used the combination of anterior transection and the hanging manoeuvre to complete resections for a variety of pathologies (11,13,2529). Apart from serving as a directional guide during parenchymal transection (25), utilizing the hanging manoeuvre is associated with a lower risk of tumour dissemination into the hepatic veins (13), reduced incidence of tumour rupture (11,13), reduced blood loss (28), lower operative time (28), reduced transfusion requirements (28), and shorter duration of hospitalization (26).

Malignant IVC invasion was initially considered an absolute contraindication to the hanging manoeuvre (30). However, there have been published case reports (29,31,25) and one small series of 7 cases (27), where this manoeuvre was used to perform complex resections facilitating partial IVC resection and reconstruction in patients with malignant invasion. There were good outcomes in all cases, all with R0 resection. Also in the series published by Coppa et al (27) there was no mortality, 40% morbidity, and an 83% overall 5-year survival rate.

In the present case, we opted to attempt an IVC-preserving strategy using a modified hanging manoeuvre. In the original description by Belghiti et al (2) in 2001, a long vascular clamp was passed along the avascular plane at the 10–11 o'clock position on the anterior surface of the IVC in order to pass a tape to suspend the liver during transection. This could not be achieved for two reasons: i) Preoperative imaging demonstrated CRLM invasion into the anterolateral IVC over the 11 o'clock position and ii) the large, heavy CRLM exerted pressure on the surface of the IVC, adding resistance to instrument passage. Thus, Belghiti's (2) classic hanging manoeuvre was modified by passing the instrument to the left of IVC at the 2–3 o'clock position. The instrument was directed cephalad to exit to the left of the left hepatic vein. Many caution against instrument passage at this location (25), as it is the usual location of the short hepatic and caudate veins. However, these are usually small veins, mostly sub-millimeter in diameter (3236), and they vary in number, position and dimensions (3335). If they are encountered during the hanging manoeuvre, the resultant bleeding is often mild due to the small diameter and low pressure within these veins. This bleeding should be easy to control by allowing the interrupted veins to be compressed by the weight of the liver. Moreover, Kanamura et al (37) demonstrated that similar short hepatic/caudate veins may be found in the classic avascular plane in 16.3% of the cases, and do not usually pose a problem. Some have described this manoeuvre under sonographic (38) or endoscopic (39,40) guidance, in order to detect and avoid short hepatic veins when they exist; however, this was not available in our institution. In the present case, the encountered bleeding was minimal and easy to control with gentle, blind passage of the instruments aided by bimanual finger dissection, when necessary, as described by Aydin et al (41).

Once the plane was established, a 20Fr nasogastric tube was passed and used it to deliver traction anteriorly and to the left, in order to lift the liver and heavy CRLM, partially relieving the pressure applied onto the IVC. This in turn allowed passage of another instrument at the 1 o'clock position, with passing of a second tube directed between the middle and left hepatic veins. This double-tube hanging manoeuvre effectively lifted the central hepatic segments off the IVC, allowing us to safely define the intended resection plane. In 2008, Chen et al (42) described a double-tape hanging manoeuvre, where two tapes were placed in an avascular plane to the right of the IVC. The rationale for this modification was to achieve complete outflow control when the tapes were lifted in opposite directions (42). However, Liddo et al (25) pointed out that this manoeuvre could not guide transection, since the tapes were not positioned along the resection line. In our modification, the tubes were passed in different planes, the rationale being to safely identify the intended plane along the IVC that would be clear of tumour, in order to guide the transection lines. We acknowledge that this modification increases the risk of rupture of the short hepatic veins and, although we believe that the resultant bleeding would be mild and can be managed appropriately, we also acknowledge that this modification is unnecessary in simple resections; it only became necessary as we were unable to safely pass an instrument in the plane described by Belghiti et al (2).

Using these techniques followed by mobilization of the right liver allowed us to expose both sides of the IVC invaded by tumour and to pass a side-biting Satinsky clamp to allow controlled resection of the IVC wall to achieve clear margins. This selective IVC clamping technique was initially described by Togo et al (5) as a means to maintain flow through the systemic and hepatic circulations. It also allowed us to evaluate the degree of narrowing that resection and primary repair would yield, in order to decide whether total vascular exclusion and IVC replacement would be necessary.

Most authorities recommend IVC reconstruction, as complete ligation usually results in venous insufficiency and acute renal failure (3,6,8). Ohwada et al (7) recommended reconstruction with an interposed segment of polytetrafluoroethylene when primary closure would result in >50% narrowing of the normal IVC diameter. In the present case, selective clamping revealed that resection would result in narrowing to ~2/3 of the original IVC diameter. Therefore, we opted for primary repair with vascular sutures, since this would sacrifice less caval wall compared with a stapled repair.

In conclusion, complex liver resection with IVC resection and reconstruction may be performed safely in centralized referral centers with dedicated hepatobiliary teams. Aggressive attempts at R0 resections are justified, since they are potentially curative for patients with CRLM. In these cases, hepatobiliary surgeons must be familiar with modified resection techniques, such as the classic hanging manoeuvre, anterior transection, selective caval clamping, total extravascular control, and IVC replacement/reconstruction. We recommend that this modification of the hanging manoeuvre be added to the armamentarium of hepatobiliary surgeons to improve safety in complex resections.

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Spandidos Publications style
Cawich SO, Thomas DA, Ragoonanan V, Ramjit C, Narinesingh D, Naraynsingh V and Pearce N: Modified hanging manoeuvre facilitates inferior vena cava resection and reconstruction during extended right hepatectomy: A technical case report. Mol Clin Oncol 7: 687-692, 2017.
APA
Cawich, S.O., Thomas, D.A., Ragoonanan, V., Ramjit, C., Narinesingh, D., Naraynsingh, V., & Pearce, N. (2017). Modified hanging manoeuvre facilitates inferior vena cava resection and reconstruction during extended right hepatectomy: A technical case report. Molecular and Clinical Oncology, 7, 687-692. https://doi.org/10.3892/mco.2017.1352
MLA
Cawich, S. O., Thomas, D. A., Ragoonanan, V., Ramjit, C., Narinesingh, D., Naraynsingh, V., Pearce, N."Modified hanging manoeuvre facilitates inferior vena cava resection and reconstruction during extended right hepatectomy: A technical case report". Molecular and Clinical Oncology 7.4 (2017): 687-692.
Chicago
Cawich, S. O., Thomas, D. A., Ragoonanan, V., Ramjit, C., Narinesingh, D., Naraynsingh, V., Pearce, N."Modified hanging manoeuvre facilitates inferior vena cava resection and reconstruction during extended right hepatectomy: A technical case report". Molecular and Clinical Oncology 7, no. 4 (2017): 687-692. https://doi.org/10.3892/mco.2017.1352