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Intraoperative visualization of morphological patterns of the thoracic duct by subcutaneous inguinal injection of indocyanine green in esophagectomy for esophageal cancer.

ABSTRACT: To prevent chylothorax after esophageal cancer surgery, it is important to recognize morphological patterns of the thoracic duct intraoperatively. The present study aimed to evaluate the safety and usefulness of near-infrared (NIR) fluorescence imaging with subcutaneous inguinal injection of indocyanine green (SII-ICG) to detect the thoracic duct during thoracoscopic esophagectomy for esophageal cancer. Patients (n = 16) who underwent thoracoscopic esophagectomy in the prone position with SII-ICG at Shinshu University Hospital between June 2020 and January 2022 were enrolled in the present study and retrospectively reviewed. Immediately prior to thoracoscopic esophagectomy, we injected 0.2-0.5 mg/kg ICG into the subcutaneous tissue in the bilateral inguinal region. The identification rate of the thoracic duct was 93.8% (n = 15), and the success rate of fluorescence using SII-ICG was 87.5% (n = 14). The visible thoracic ducts had four patterns: a typical pattern in 50% (n = 8), duplication pattern in 18.8% (n = 3), branching pattern in 12.5% (n = 2), and plexiform pattern in 12.5% (n = 2). In all cases, ICG fluorescence did not disappear and was visible during the thoracic surgery. No SII-ICG-related complications were observed. Intraoperative NIR fluorescence imaging of the thoracic duct using SII-ICG is a simple and safe method with very high detection sensitivity. This method can be a powerful tool for avoiding thoracic duct injuries during esophageal cancer surgery.

SUBMITTER: Tokumaru S

PROVIDER: S-EPMC9628221 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature

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Intraoperative visualization of morphological patterns of the thoracic duct by subcutaneous inguinal injection of indocyanine green in esophagectomy for esophageal cancer.

Tokumaru Shigeo S Kitazawa Masato M Nakamura Satoshi S Koyama Makoto M Soejima Yuji Y

Annals of gastroenterological surgery 20220622 6

To prevent chylothorax after esophageal cancer surgery, it is important to recognize morphological patterns of the thoracic duct intraoperatively. The present study aimed to evaluate the safety and usefulness of near-infrared (NIR) fluorescence imaging with subcutaneous inguinal injection of indocyanine green (SII-ICG) to detect the thoracic duct during thoracoscopic esophagectomy for esophageal cancer. Patients (n = 16) who underwent thoracoscopic esophagectomy in the prone position with SII-IC ...[more]

PMID: 36338584

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Project description:Background Whether extended robot-assisted esophagectomy with thoracic duct resection (RAE-TDR) has a favorable effect on esophageal cancer patients is not yet known. This study sought to analyze the safety and efficiency of RAE-TDR. Methods From January 2019 to July 2020, 73 thoracic duct (TD)-resected and 127 TD-preserved consecutive patients who received standard RAE McKeown surgery were enrolled in this study. The perioperative-related indicators of recurrence-free survival (RFS) and overall survival (OS) at 1-year were compared between the 2 groups. Results In relation to morbidity, the Clavien–Dindo (CD) classifications for grades greater than or equal to II–III were similar between the 2 groups (P>0.05). The number of retrieved total lymph nodes (LNs) and mediastinal nodes were significantly higher in the TD-resected group than in the TD-preserved group (total lymph nodes: 29.0±11.1 vs. 25.1±8.5, P=0.006; mediastinal nodes: 19.5±8.0 vs. 16.1±5.5, P=0.002). Additionally, more metastatic TD-related LNs were harvested in cT3–4 patients (2.3±3.7 vs. 1.7±2.8; P=0.21). The rates of LN recurrence and local recurrence were similar between the 2 groups (LN recurrence: 6.8% vs. 7.1%, P>0.99; local recurrence: 1.4% vs. 2.4%, P>0.99). The OS and RFS at 1-year were equivalent regardless of the TD procedure at each stage (P>0.05). However, the rate of hematogenous metastasis in the TD-resected group was significantly elevated (17.8% vs. 7.9%; P=0.034). Conclusions RAE-TDR may help to improve total and metastatic LN harvest, especially in patients with advanced esophageal squamous cell carcinoma (ESCC) without increasing the intra- and post-operative adverse events. However, RAE-TDR did not lead to a decrease in the local recurrence rate within the short-term follow-up period. Whether the increase in distant metastasis rate in the TD-resected group was associated with relevant immune system damage is unclear. Thus, nonselective RAE-TDR is not routinely recommended.

Project description:BackgroundIatrogenic bile duct injuries (BDIs) prevention during laparoscopic cholecystectomy (LC) relies on meticulous anatomical dissections through direct visualization. Near-infrared fluorescence (NIRF) with indocyanine green (ICG) improves the visualization of extrahepatic biliary structures. Although ICG can be administered either intravenously or intragallbladder, there remains uncertainty regarding the optimal method for different patient populations. This study sought to assess the suitability of each method for specific patient groups.MethodsBetween October 2021 and May 2022, 59 consecutive patients underwent fluorescence-guided LC at West China Hospital of Sichuan University. Among them, 32 patients received an intravenous injection of ICG (10 mg) 10 to 12 hours prior to surgery (Group A: the intravenous group), while 27 patients received an intragallbladder injection of ICG (10 mg) (Group B: the intragallbladder group). Baseline clinical factors, inclusion criteria, and measurements of parameters and complications were assessed. Data were retrospectively collected and analyzed to evaluate the comparability of the two groups and the clinical outcomes.ResultsGroups A and B included 32 patients (18 males, 14 females), and 27 patients (13 men, 14 women), respectively. In our statistical analysis, significant differences were observed in preoperative diagnoses between the two groups (P=0.041), but the majority of other baseline clinical factors were comparable. Notably, no statistically significant differences were found in complication rates. However, Group A had a shorter operative time (60.38±9.35 vs. 66.78±9.88 min, P=0.01) and superior bile duct fluorescence (P=0.04) than Group B. Interestingly, fluorescence was not observed in impacted gallbladder stones in Group B. Additionally, patients with cirrhosis (P=0.008) and fatty liver (P=0.005) in Group B had higher common bile duct-to-liver ratios (BLRs) than those in Group A.ConclusionsICG fluorescence cholangiography allows to visualize extrahepatic biliary anatomical structures with both administration methods. However, the efficacy of bile duct fluorescence varies with different administration routes in diverse patient populations. Hence, appropriate administration route selection for ICG should be tailored to individual patients.

Project description:ImportanceIdentification of the tumor margin during surgery is important for precise minimal resection of lung tumors. Intravenous injection of indocyanine green (ICG) has several limitations when used for intraoperative visualization of lung cancer.ObjectivesTo describe a technique for intraoperative visualization of lung tumor margin using ICG inhalation and evaluate the clinical applicability of the technique in mouse and rabbit lung tumor models as well as lung specimens of patients with lung tumors.Design, setting, and participantsIn lung tumor models of both mice and rabbits, the distribution of inhaled ICG in the lung tumor margin was investigated in vivo and ex vivo using a near-infrared imaging system. Lung tumor margin detection via inhalation of ICG was evaluated by comparing the results obtained with those of the intravenous injection method (n = 32, each time point for 4 mice). Based on preclinical data, use of ICG inhalation to help detect the tumor margin in patients with lung cancer was also evaluated (n = 6). This diagnostic study was conducted from May 31, 2017, to March 30, 2019.Main outcomes and measuresThe use of tumor margin detection by inhaled ICG was evaluated by comparing the inhaled formulation with intravenous administration of ICG.ResultsFrom 10 minutes after inhalation of ICG to 24 hours, the distribution of ICG in the lungs was significantly higher than that in other organs (signal to noise ratio in the lungs: 39 486.4; interquartile range [IQR], 36 983.74-43 592.5). Ex vivo and histologic analysis showed that, in both lung tumor models, inhaled ICG was observed throughout the healthy lung tissue but was rarely found in tumor tissue. The difference in the fluorescent signal between healthy and tumor lung tissues was associated with the mechanical airway obstruction caused by the tumor and with alveolar macrophage uptake of the inhaled ICG in healthy tissues. Inhalation at a 20-fold lower dose of ICG had a 2-fold higher efficiency for tumor margin detection than did the intravenous injection (2.9; IQR, 2.7-3.2; P < .001).Conclusions and relevanceThe results of this study suggest that lung-specific inhalation delivery of ICG is feasible and may be useful for the intraoperative visualization of lung tumor margin in clinical practice.

Project description:BackgroundWe observed the feasibility and effectiveness of multi-injection thoracic paravertebral block (TPB) via the intrathoracic approach under thoracoscopic direct vision for analgesia after thoracoscopic-laparoscopic esophagectomy (TLE).MethodsSixty patients undergoing TLE were randomly divided into a control group and an observation group. All patients underwent TPB via the intrathoracic approach at the three levels of T2, 5, and 8 with a scalp needle before closing the chest. The patients in the observation group received 10 ml 0.375% ropivacaine at each level, and the patients in the control group received 10 ml of 0.9% saline at each level. A patient-controlled intravenous analgesic (PCIA) pump with sufentanil was attached to all patients after surgery. The sufentanil consumption, number of PCIA presses and use of rescue analgesia in the first 24 h after surgery were recorded. The visual analogue scale (VAS) scores (rest and coughing) were recorded at 2 h, 6 h, 12 h, 24 h, and 48 h after surgery. The duration of postoperative hospital stay, active cough rate, first ambulation, and the incidence of adverse reactions after surgery was recorded.ResultsThe sufentanil consumption in the observation group was significantly lower than that in the control group (34.7 ± 1.9 µg vs. 52.1 ± 2.1 µg; P < 0.001). The VAS score at each postoperative time point, number of PCIA presses, use of rescue analgesia, and the incidence of adverse reactions in the observation group were significantly lower than those in the control group. The postoperative active cough rate of patients in the observation group was significantly higher than those in the control group, and the times of the first ambulation after surgery and postoperative hospital stay in the observation group were significantly shorter than those in the control group (all P < 0.05).ConclusionsMulti-injection TPB via the intrathoracic approach under thoracoscopic direct vision is easy to perform and can effectively alleviate postoperative pain after TLE with fewer adverse reactions and contributing to improved postoperative recovery.

Dataset Information

Intraoperative visualization of morphological patterns of the thoracic duct by subcutaneous inguinal injection of indocyanine green in esophagectomy for esophageal cancer.

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Intraoperative visualization of morphological patterns of the thoracic duct by subcutaneous inguinal injection of indocyanine green in esophagectomy for esophageal cancer.

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