Application of Laparoscopic Hepatectomy Combined with Intraoperative Microwave Ablation in Colorectal Cancer Liver Metastasis
March 3rd, 2023
This protocol describes the laparoscopic resection of colorectal cancer liver metastases combined with ultrasound-guided microwave ablation. This technique can safely, effectively, and accurately treat refractory liver metastases <3 cm, reduce postoperative complications, and accelerate the postoperative rehabilitation of patients.
Surgical resectioning combined with microwave ablation provides a safe and effective method for multiple colorectal cancer liver metastases, especially when the residual liver volume is insufficient. This technique simplifies the operation procedures, reduces the risk of complications such as bleeding and bile leakage, shortens the operation time, and accelerates the postoperative recovery. In addition to colorectal cancer liver metastases, this method can also be applied to multiple primary liver cancer or other secondary liver tumors.
It's recommended to master the basic theory of liver ultrasound and practice portal vein puncture, guided by laparoscopic ultrasound before using this technique. Insert a 12 centimeter trocar into the navel and abdominal cavity for erasion. Place five centimeter trocars under the xiphoid process and below the costal margin of the right midclavicular line.
Examine the cavity and the parenchymal organs by placing the naval trocar into the laparoscope. Using an ultrasonic knife, separate the round and flacid form ligaments attached to the abdominal wall and liver diaphragm. After intravenous injection of the contrast agent, place the laparoscopic probe into the abdominal cavity.
Then examine the liver by moving the probe over the tissues. Locate the contrast defined metastatic tumors in the S5 and S7 liver segments using ultrasound. Next, insert two five centimeter trocars to aid in the procedure.
Confirm the location of the tumors using ultrasound probe. Remove the connecting tissues using an ultrasound scalpel. Expose the hepatic pedicles between segments two and three and sever the branch of the umbilical fissure vein.
Then start dissecting the parenchyma of the left lateral lobe using an ultrasonic scalpel. Continue the dissection through the entire lobe. Then sever the left lateral lobe.
Collect the dissected lobe. Then detach the liver by removing the surrounding connecting tissue. Next, using the laparoscopic ultrasound, locate the tumor boundaries and mark the liver surface.
Detect the location of liver metastases using an ultrasound probe and mark the location keeping less than one centimeter of margin from the tumor. Insert the microwave ablation needle into the abdominal cavity through the percutaneous puncture. Insert the needle into the center of the tumor under the laparoscopic probe guidance and perform microwave ablation.
Remove the needle after complete ablation using an ultrasonic scalpel, electro coagulate the liver parenchyma sections. Continue the electrocoagulation until the tumor tissue is excised. Collect the tissue and place it in the bag.
Place a hemostatic gauze. Then clean the abdominal cavity by rinsing the tissue and removing the hemostatic gauze. Release the umbilical fissure vein and remove the tissue debris.
Finally place the drainage tube. The surgery had a runtime of 130 minutes. Liver ablation was successful at under 55 watts for five minutes, resulting in low intraoperative blood loss of 50 milliliters.
Postoperative complications were not observed, which resulted in patient discharge eight days after the surgery. Laparoscopic ultrasound scan of the whole liver is very important after the injection of contrast agent. It may reveal lesions that are difficult to find in preoperative imaging such as MR or ct.
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Overview
This protocol describes a laparoscopic technique for resecting colorectal cancer liver metastases while utilizing ultrasound-guided microwave ablation. This combined approach is effective for treating liver metastases under 3 cm, minimizing postoperative complications and enhancing recovery.
Key Study Components
Area of Science
- Surgical oncology
- Minimally invasive techniques
- Oncology
Background
- Colorectal cancer can lead to liver metastases, complicating treatment.
- Microwave ablation is a technique used to destroy cancer cells.
- Combining resection with ablation may improve outcomes.
- Understanding liver anatomy and ultrasound guidance is crucial for this procedure.
Purpose of Study
- To evaluate the safety and effectiveness of laparoscopic resection combined with microwave ablation.
- To reduce complications associated with liver surgery.
- To enhance postoperative recovery times for patients.
Methods Used
- Laparoscopic resection of liver metastases.
- Ultrasound-guided microwave ablation.
- Insertion of trocars for access to the abdominal cavity.
- Monitoring of residual liver volume during the procedure.
Main Results
- The combined technique is safe and effective for treating liver metastases.
- Reduced risk of complications such as bleeding and bile leakage.
- Shortened operation time compared to traditional methods.
- Accelerated postoperative recovery for patients.
Conclusions
- Laparoscopic resection with microwave ablation is a viable option for colorectal cancer liver metastases.
- This method can also be adapted for primary liver cancer and other secondary tumors.
- Proper training in ultrasound techniques is recommended for optimal outcomes.
Frequently Asked Questions
Executive Industry Relevance
Laparoscopic hepatectomy combined with intraoperative microwave ablation addresses the challenge of treating multiple, anatomically complex colorectal cancer liver metastases while preserving functional liver mass. This integrated approach enhances lesion localization, reduces perioperative risk, and supports more predictable surgical outcomes, directly impacting translational research and early clinical development. The method's ability to manage small, difficult-to-access lesions increases confidence in surgical intervention strategies and informs risk-adjusted portfolio decisions.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Enables precise anatomical and functional mapping of metastatic lesions for biological de-risking.
- Supports validation of surgical and ablation targets in complex hepatic environments.
- Improves predictive confidence in intervention outcomes for translational research.
Screening & Assay Development
- Facilitates the preparation of validated surgical models for evaluating new therapeutic modalities.
- Standardizes intraoperative imaging and ablation parameters for reproducibility.
- Provides quantitative intraoperative metrics such as lesion size, ablation time, and blood loss.
Translational & Preclinical Research
- Aligns with disease-relevant models for metastatic colorectal cancer in the liver.
- Enables continuity from preclinical surgical models to early clinical feasibility studies.
- Supports risk-adjusted advancement of surgical and device-based interventions.
Pipeline & Workflow Integration
This combined surgical and ablation technique fits within the translational continuum from preclinical model development to early clinical validation of interventional oncology strategies.
- Discovery Biology: Enhances hypothesis testing for metastatic lesion management and surgical de-risking.
- Screening: Provides reproducible intraoperative endpoints for evaluating new devices or adjunct therapies.
- Analytics: Delivers quantitative outputs such as ablation efficacy, operative time, and complication rates.
- Translational Research: Bridges preclinical findings with clinical feasibility in metastatic liver disease.
- Enterprise Reuse: Establishes a standardized platform for surgical and ablation studies across oncology portfolios.
Operational & Enterprise Impact
- Scientific Value: Increases predictive confidence and reduces mechanistic ambiguity in surgical oncology models.
- Operational Value: Improves standardization, reproducibility, and scalability of complex hepatic interventions.
- Strategic Value: Enables better go/no-go decisions and reduces late-stage biological risk in interventional portfolios.
- Portfolio Impact: Supports risk-adjusted prioritization of surgical and device-based oncology programs.
Implementation Considerations
- Requires expertise in laparoscopic ultrasound and intraoperative imaging.
- Demands access to advanced surgical and ablation instrumentation.
- Necessitates cross-team standardization of imaging and procedural protocols.
- Adaptation may be needed for different hepatic anatomies or tumor types.
- Limitations include lesion accessibility and the need for real-time imaging validation.
