Use of Ligasure™ Bipolar Diathermy System in vaginal hysterectomy

Enabling Technologies for Gynecologic Vaginal Surgery: A Systematic Review

OBJECTIVE

To systematically review the literature to evaluate clinical and surgical outcomes for technologies that facilitate vaginal surgical procedures.

DATA SOURCES

We systematically searched MEDLINE, EMBASE, and ClinicalTrials.gov from January 1990 to May 2022.

METHODS OF STUDY SELECTION

Comparative and single-arm studies with data on contemporary tools or technologies facilitating intraoperative performance of vaginal gynecologic surgical procedures for benign indications were included. Citations were independently double screened, and eligible full-text articles were extracted by two reviewers. Data collected included study characteristics, technology, patient demographics, and intraoperative and postoperative outcomes. Risk of bias for comparative studies was assessed using established methods, and restricted maximum likelihood model meta-analyses were conducted as indicated.

TABULATION, INTEGRATION, AND RESULTS

The search yielded 8,658 abstracts, with 116 eligible studies that evaluated pedicle sealing devices (n=32), nonrobotic and robotic vaginal natural orifice transluminal endoscopic surgery (n=64), suture capture devices (n=17), loop ligatures (n=2), and table-mounted telescopic cameras (n=1). Based on 19 comparative studies, pedicle sealing devices lowered vaginal hysterectomy operative time by 15.9 minutes (95% CI, -23.3 to -85), blood loss by 36.9 mL (95% CI, -56.9 to -17.0), hospital stay by 0.2 days (95% CI, -0.4 to -0.1), and visual analog scale pain scores by 1.4 points on a subjective 10-point scale (95% CI, -1.7 to -1.1). Three nonrandomized comparative studies and 53 single-arm studies supported the feasibility of nonrobotic vaginal natural orifice transluminal endoscopic surgery for hysterectomy, adnexal surgery, pelvic reconstruction, and myomectomy. Data were limited for robotic vaginal natural orifice transluminal endoscopic surgery, suture capture devices, loop ligatures, and table-mounted cameras due to few studies or study heterogeneity.

CONCLUSION

Pedicle sealing devices lower operative time and blood loss for vaginal hysterectomy, with modest reductions in hospital stay and pain scores. Although other technologies identified in the literature may have potential to facilitate vaginal surgical procedures and improve outcomes, additional comparative effectiveness research is needed.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO, CRD42022327490.

"In Vitro" Evaluation of Energy-Based Sealing of Graft Side Branches in Bypass Surgery

INTRODUCTION

Our objective was to compare the in vitro efficacy of electrothermal bipolar [EB] vessel sealing and ultrasonic harmonic scalpel [HS] versus mechanical interruption, with conventional ties or surgical clips (SC), in sealing saphenous vein (SV) collaterals, during its eventual preparation for bypass surgery.

METHODS

Experimental in vitro study on 30 segments of SV. Each fragment included two collaterals at least 2 mm in diameter. One of them was sealed by ligation with 3/0 silk ties (control) and the other one with EB (n = 10), HS (n = 10) or medium-6 mm SC (n = 10). After incorporation in a closed circuit with pulsatile flow, the pressure was progressively increased until causing rupture. Collateral diameter, burst pressure, leak point, and histological study were recorded.

RESULTS

Burst pressure was higher for SC (1320.20 ± 373.847 mmHg) as compared with EB (942.2 ± 344.9 mmHg, p = 0.065), and especially with HS (637.00 ± 320.61 mmHg, p = 0.0001). No statistically significant difference between EB and HS was found, and bursting always happened at supraphysiological pressures. The leak point for HS was always detected in the sealing zone (10/10), while for EB and SC, it occurred in the sealing zone only in 6/10(60%) and 4/10(40%), respectively (p = 0.015).

CONCLUSIONS

Energy delivery devices showed similar efficacy and safety in sealing of SV side branches. Although bursting pressure was lower than with tie ligature or SC, non-inferiority efficacy was shown at the range of physiological pressures in both, EB and HS. Due to their speed and easy handling, they may be useful in the preparation of the venous graft during revascularization surgery. However, remaining questions about healing process, potential spread of tissue damage and sealing durability, will require further analysis.

Comparison of the LigaSure™ bipolar vessel sealer to monopolar electrocoagulation for thoracoscopic lobectomy and lymphadenectomy: a prospective randomized controlled trial

BACKGROUND

High-energy devices allow better vessel sealing compared with monopolar electrocautery and could improve the outcomes of surgical operations. The objective of the study was to compare tissue dissection by the LigaSure™ device with that by monopolar electrocoagulation for thoracoscopic lobectomy and lymphadenectomy.

METHODS

This pragmatic, parallel group, prospective randomized controlled trial was funded by the Medtronic External Research Program (ISR-2016-10,756) and registered at www.

CLINICALTRIALS

gov (NCT03125798). The study included patients aged 18 years or older, who had undergone thoracoscopic lobectomy with lymphadenectomy at the Department of Thoracic Surgery of Poznan University of Medical Sciences between May 3, 2018, and November 4, 2021. Using simple randomization, the patients were assigned to undergo tissue dissection with either the LigaSure device (study group) or monopolar electrocautery (control group). Participants and care givers, except operating surgeons, were blinded to group assignment. The primary outcome was postoperative chest drainage volume. Secondary outcomes were change of the esophageal temperature during subcarinal lymphadenectomy and C-reactive protein level 72 h after surgery.

RESULTS

Study outcomes were analyzed in 107 patients in each group. We found no differences between the study and control groups in terms of chest drainage volume (550 vs. 600 mL, respectively; p = 0.315), changes in esophageal temperature (- 0.1 °C vs. - 0.1 °C, respectively; p = 0.784), and C-reactive protein levels (72.8 vs. 70.8 mg/L, respectively; p = 0.503). The mean numbers of lymph nodes removed were 12.9 (SD: 3.1; 95% CI, 12.4 to 13.5) in the study group and 11.6 (SD: 3.2; 95% CI, 11.0 to 12.2) in the control group (p < 0.001).

CONCLUSIONS

The use of the LigaSure device did not allow to decrease the chest drainage volume, local thermal spread, and systemic inflammatory response. The number of lymph nodes removed was higher in patients operated with the LigaSure device, which indicated better quality of lymphadenectomy.

A three-portal laparoscopic hysterectomy in a chimpanzee (Pan troglodytes) with a uterine manipulator and vessel sealing device

OBJECTIVE

To report the treatment and outcome of a a captive chimpanzee (Pan troglodytes) undergoing 3-portal laparoscopic hysterectomy. Additionally, the technique used for successful urinary catheterization is described.

ANIMALS

A 29-year-old female intact chimpanzee with uterine bleeding.

STUDY DESIGN

Clinical case report.

METHODS

Uterine changes consistent with adenomyosis and/or endometriosis were noted on abdominal ultrasonographic and computed tomographic examinations. A urinary catheter was placed before a 3-portal laparoscopic hysterectomy with a uterine manipulator (VCare) and a vessel sealer (Ligasure). The uterus was submitted for histopathology.

RESULTS

Preoperative urinary catheterization was achieved with several modifications and prevented bladder protrusion into the surgical field. Laparoscopy provided excellent visualization of the pelvic structures and VCare effectively maneuvered the uterus for a safe and efficient dissection. The use of the vessel sealer was effective, and bleeding was minimal. Anesthesia and surgery lasted 240 and 150 minutes, respectively. No complications were encountered. Histopathological changes of the uterus were consistent with adenomyosis and myometrial hyperplasia. The chimpanzee recovered uneventfully and returned to normal behavior with no recurrence of uterine bleeding 5 months after surgery.

CONCLUSION

The 3-portal laparoscopic technique reported here allowed hysterectomy without complication in this chimpanzee. Urinary catheterization was technically challenging but successful.

LigaSure versus Conventional Parotidectomy: A Systematic Review and Meta-Analysis

Surgery with parotidectomy is the preferable treatment for most parotid tumors. Our meta-analysis compared the differences between the use of the LigaSure (LS) device and the conventional suture ligation technique (CT) in parotidectomies. A literature search in databases including EMBASE, MEDLINE, and the Cochrane Library was carried out. Studies including parotidectomy using LS and CT were included with the intraoperative and postoperative parameters collected. Continuous operative time data were measured by mean differences (MDs). Discrete data on postoperative complications, including facial palsy, postoperative bleeding, and salivary complications, were evaluated with risk differences (RDs). All values were reported with 95% confidence intervals (CIs). Five studies were included in our meta-analysis. The pooled analysis demonstrated a significant reduction in operative time in the LS group (MD: −21.92; 95% CI, −30.18 to −13.66). In addition, the analysis indicated that the incidence of postoperative complications, including permanent facial palsy (RD, −0.01; 95% CI, −0.06 to 0.05), temporary facial palsy (RD, 0.00; 95% CI, −0.03 to 0.04), salivary complications (RD, −0.01; 95% CI, −0.08 to 0.06), and postoperative bleeding (RD, −0.02; 95% CI, −0.07 to 0.04), were all similar between the LS group and the CT group. According to the results, the LS device appears to be a safe and useful tool and could shorten the operative time in patients needing parotidectomy.

A Prospective Interventional Study on LigaSureTM Haemorrhoidectomy as a Daycare Procedure

Objective

This study was designed as a prospective and interventional study that evaluated LigaSure™ haemorrhoidectomies with regional anaesthesia as a daycare procedure.

Methods

Patients with third- and fourth-degree haemorrhoids were recruited from the clinic from January 2018 to December 2019. The procedure was performed as a day case under regional anaesthesia. Using a LigaSure^TM device, excisional haemorrhoidectomies (Milligan-Morgan haemorrhoidectomy) were performed without sutures or an anal sponge. We evaluated wound bleeding, pain and urinary retention per daycare protocols.

Results

A total of 264 patients were enrolled. There were 153 males (57.9%) with a median age of 30 years old (range 16 years old-80 years old). A total of 142 patients (54%) had third-degree haemorrhoids, while the rest had fourth-degree haemorrhoids. The median operating time was 8 min (range 4 min-17 min) and minimal blood loss was observed. During follow-up, the complications were one case (0.3%) had anal stenosis, one case (0.3%) had minimal bleeding and one case (0.3%) had urine retention. Upon discharge, four patients (1.5%) required additional analgesia and another four (1.5%) developed post-spinal headaches. No incontinence was encountered.

Conclusion

LigaSure™ excisional haemorrhoidectomy is a safe and effective daycare procedure with acceptable re-admission and complication rates.

Computational Simulations for Infrared Laser Sealing and Cutting of Blood Vessels

Blood vessel burst pressures were simulated and predicted for sealing and cutting of vessels in a two-step process, using low (<25 W), medium (~100 W), and high (200 W) power lasers at a wavelength of 1470 nm. Monte Carlo optical transport, heat transfer, Arrhenius integral tissue damage simulations, and vessel pressure equations were utilized. The purpose of these studies was to first validate the numerical model by comparison with experimental results (for low and medium power) and then to use the model to simulate parameters that could not be experimentally tested (for high power). The goal was to reduce the large range of parameters (power, irradiation time, and linear beam dimensions) to be tested in future experiments, for achieving short vessel sealing/cutting times, minimal bifurcated seal zones (BSZ), and high vessel burst pressures. Blood vessels were compressed to 400 μm thickness. A wide range of linear beam profiles (1-5 mm widths and 8-9.5 mm lengths), incident powers (20-200 W) and clinically relevant irradiation times (0.5-5.0 s) were simulated and peak seal and cut temperatures as well as thermal seal zones, ablation zones, and BSZ computed. A simplistic mathematical expression was used to estimate vessel burst pressures based on seal width. Optimal low-power parameters were: 24W/5s/8×2mm (sealing) and 24W/5s/8×1mm (cutting), yielding a BSZ of 0.4 mm, corresponding to experimental burst pressures of ~450 mmHg. Optimal medium-power parameters were: 90W/1s/9.5×3mm (sealing) and 90W/1s/9.5×1mm (cutting), yielding a BSZ of 0.9 mm for burst pressures of ~1300 mmHg. Simulated only optimal high-power parameters were: 200W/0.5s/9×3 mm (sealing) and 200W/0.5s/9×1mm (cutting), yielding a BSZ of 0.9 mm and extrapolated to predict a seal strength of ~1300 mmHg. All lasers produced seal zones between 0.4-1.5 mm, corresponding to high vessel burst pressures of 300-1300 mmHg (well above normal systolic blood pressure of 120 mmHg). Higher laser powers enable shorter sealing/cutting times and higher vessel strengths.

Ligasure™ Impact and Ligasure™ Small Jaw in Body Contouring after Massive Weight Loss: A New Perspective

BACKGROUND

The most effective dissection technique for elevating flaps in body contouring is still controversial, particularly in high-risk massive weight loss (MWL) patients. LigaSure (Medtronic, Dublin, Ireland) is an energy device commonly used among different surgical specialties to reduce morbidity and improve outcomes. The aim of this study is to investigate the effectiveness of LigaSure Impact and LigaSure Small Jaw in body contouring after MWL compared with conventional technique.

MATERIAL AND METHODS

Patients who underwent abdominoplasty, mastopexy, brachioplasty and thigh lift after MWL at a single center from 1 December 2018 to 1 March 2020 were retrospectively reviewed. In each procedure patients were divided into two groups according to the dissection technique: LigaSure group and monopolar electrosurgery group. Patients characteristics, perioperative details and postoperative complications were evaluated.

RESULTS

Fourty-five patients underwent abdominoplasty, twenty-six mastopexy, twenty brachioplasty and sixteen medial thigh lift. Using LigaSure, operative time was longer in abdominoplasty and thigh lift, but shorter in mastopexy and brachioplasty. Although not statistically significant, the amount of blood and serum recorded from drains in the first 36 hours was reduced in LigaSure groups. Additional analgesic intake was reduced with LigaSure as well as postoperative subjective pain. In all body contouring procedures statistically significant difference was found in days of hospital stay favoring LigaSure groups. Complications occurred most frequently in control groups compared to LigaSure groups.

CONCLUSION

LigaSure Impact and LigaSure Small Jaw may be beneficial in improving outcomes because they might reduce fluids drainage, analgesics intake, hospital stay and postoperative complications.

Novel Optical Linear Beam Shaping Designs for use in Laparoscopic Laser Sealing of Vascular Tissues. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2020;2020:5049-5052. [PMID: 33019121 PMCID: PMC8311731 DOI: 10.1109/embc44109.2020.9176571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0]

Suture ligation of vascular tissues is slow and skill intensive. Ultrasonic (US) and radiofrequency (RF) devices enable more rapid vascular tissue ligation to maintain hemostasis, than sutures and mechanical clips, which leave foreign objects in the body and require exchange of instruments. However, US and RF devices are limited by excessive collateral thermal damage to adjacent tissues, and high jaw temperatures that require a long time to cool. A novel alternative method using infrared (IR) laser energy is being developed for more rapid and precise sealing of vessels. This study describes design, modeling, and initial testing of several optical beam shaping geometries for integration into the standard jaws of a laparoscopic device. The objective was to transform the circular laser beam into a linear beam, for uniform, cross-irradiation and sealing of blood vessels. Cylindrical mirrors organized in a staircase geometry provided the best spatial beam profile.Clinical Relevance-This study explored several optical designs for potential integration into the standard jaws of a laparoscopic vessel sealing device, transforming a circular laser beam into a linear beam for sealing of vascular structures.

Exogenous abscisic acid (ABA) promotes cadmium (Cd) accumulation in Sedum alfredii Hance by regulating the expression of Cd stress response genes

Sedum alfredii Hance is a zinc (Zn) and cadmium (Cd) hyperaccumulator plant. However, the regulatory role of plant hormones in the Zn or Cd uptake and accumulation of S. alfredii remains unclear. In this work, the growth, Cd accumulation, abscisic acid (ABA) synthesis and catabolism, malonaldehyde (MDA) content, and transcriptional level of some Cd stress response genes under ABA and Cd co-treatment were investigated to reveal the impact of ABA on Cd resistance and Cd accumulation of S. alfredii. The results show that 0.2 mg/L ABA and 100 μmol/L Cd co-treatment enhanced Cd accumulation and growth in S. alfredii, whereas lower or higher ABA concentrations weaken or even reverse this effect, which was positively correlated with endogenous ABA content. The increase in endogenous ABA content might be the results of the increasing ABA synthetase activities and decreasing ABA lytic enzyme, which was induced by the application of 0.2 mg/L ABA under 100 μmol/L Cd treatment. Principal component analysis (PCA) indicated that ABA impacted the expression pattern of Cd stress response genes, which coincided with the Cd accumulation pattern in the shoots of S. alfredii. Cross-over analysis of partial least squares-discriminant analysis (PLS-DA) and correlation analysis indicated that HsfA4c, HMA4 expression in roots, and HMA2, HMA3, CAD, NAS expression in shoots were correlated with endogenous ABA, which suggests that endogenous ABA improves Cd resistance of seedlings, switches the root-to-shoot transporter from HMA2 to HMA4, and transports more Cd into apoplasts to promote Cd accumulation in the shoots of S. alfredii. Taken together, ABA plays an essential role not only in Cd resistance but also in Cd transport from root to shoot in S. alfredii under Cd stress.

A novel surgical technique for enucleation in rabbits to reduce the risk of intra- and post-operative orbital hemorrhage

A 10-year-old male castrated Holland Lop rabbit (Oryctolagus cuniculus) was presented for severe ulcerative stromal keratitis of the right eye and a luxated hypermature cataract and glaucoma of the left eye. Staged bilateral enucleation was elected. A LigaSure™ electrosurgical bipolar vessel-sealing device was used as a means to minimize intraoperative and post-operative hemorrhage, especially that associated with the orbital venous plexus. The LigaSure™ was used to ligate and transect all extraocular muscles, the optic nerve bundle, and the base of the third eyelid with no complications encountered. Overall, the LigaSure™ was easy to use, resulted in minimal hemorrhage, and reduced surgery time. This is the first report of the use of a LigaSure™ to aid in the enucleation of a rabbit. Although only positive results were achieved as an alternative to conventional methodologies, its use in clinical practice should be that of caution until a larger study evaluating the long-term results is performed.

Ligasure impact™might reduce blood loss, complications, and re-operation occurrence after abdominoplasty in massive-weight-loss patients: A Comparative Study

Background and Aims:

The most effective dissection technique for raising the flap in abdominoplasty is still controversial, particularly in high-risk massive-weight-loss patients. LigaSure Impact™vessel-sealing system (Medtronic, Dublin, Ireland) is an energy device commonly used among different surgical specialties to reduce morbidity and implement outcomes. The aim of this study was to investigate the effectiveness of LigaSure Impact in abdominoplasty compared with the conventional techniques, diathermia.

Material and Methods:

Patients underwent primary abdominoplasty after massive weight loss at a single center from 1 January 2008 to 31 May 2015 and were retrospectively reviewed. A total of 94 patients eligible for the study were divided into two groups on basis of the dissection technique: LigaSure Impact group (29 patients) and the conventional technique group (65 patients). Total intraoperative blood loss was the primary endpoint. Duration of the operation, perioperative complications and re-operation were recorded as secondary endpoints.

Results:

Baseline characteristics were well balanced between the groups. Significant differences were found in intraoperative blood loss favoring LigaSure Impact group (259.6 ± 198.8 mL vs 377.9 ± 190.0 mL, p = 0.004) and blood transfusion rates (13.8% vs 35.4%, p = 0.047). In contrast, operative time was significantly longer in LigaSure Impact group (168.6 ± 121.2 vs 179.7 ± 57.6 min, p = 0.005), while a tendency to shorter hospital stay was found in LigaSure Impact group (3.6 ± 1.1 days vs 4.6 ± 3.2 days, p = 0.081). Overall complications occurrence, Clavien–Dindo grade II (24.1% vs 55.4%) and grade III (13.8% vs 30.8%) complications were significantly lower in LigaSure Impact group (respectively, p = 0.005, p = 0.007, p = 0.016). Late (>30 days) re-operation rate was significantly lower in the LigaSure Impact group (6.9% vs 27.70%, p = 0.0028). Specific wound complications showed no significant difference.

Conclusion:

LigaSure Impact vessel-sealing system may be beneficial in improving abdominoplasty outcomes in massive-weight-loss patients because it might reduce blood loss, need for transfusions, complications, and re-operations.

Rapid sealing of porcine renal blood vessels, ex vivo, using a high power, 1470-nm laser, and laparoscopic prototype

Energy-based, radiofrequency (RF) and ultrasonic (US) devices currently provide rapid sealing of blood vessels during laparoscopic procedures. We are exploring infrared lasers as an alternate energy modality for vessel sealing, capable of generating less collateral thermal damage. Previous studies demonstrated feasibility of sealing vessels in an in vivo porcine model using a 1470-nm laser. However, the initial prototype was designed for testing in open surgery and featured tissue clasping and light delivery mechanisms incompatible with laparoscopic surgery. In this study, a laparoscopic prototype similar to devices currently in surgical use was developed, and performance tests were conducted on porcine renal blood vessels, ex vivo. The 5-mm outer-diameter laparoscopic prototype featured a traditional Maryland jaw configuration that enables tissue manipulation and blunt dissection. Laser energy was delivered through a 550 - ? m -core-diameter optical fiber with side-delivery from the lower jaw and beam dimensions of 18 - mm ? length × 1.2 - mm ? width . The 1470-nm diode laser delivered 68 W with 3-s activation time, consistent with vessel seal times associated with RF and US-based devices. A total of 69 fresh porcine renal vessels with mean diameter of 3.3 ± 1.7 ?? mm were tested, ex vivo. Vessels smaller than 5-mm diameter were consistently sealed (48/51) with burst pressures greater than malignant hypertension blood pressure (180 mmHg), averaging 1038 ± 474 ?? mmHg . Vessels larger than 5 mm were not consistently sealed (6/18), yielding burst pressures of only 174 ± 221 ?? mmHg . Seal width, thermal damage zone, and thermal spread averaged 1.7 ± 0.8 , 3.4 ± 0.7 , and 1.0 ±

A network meta-analysis of updated haemostatic strategies for hysterectomy

OBJECTIVE

To determine the best haemostatic strategy for hysterectomy through a network meta-analysis.

METHODS

We conducted a systematic literature search of the PubMed, Embase, and Cochrane Library databases and extracted data from randomized controlled trials comparing haemostatic strategies for hysterectomy. Direct comparisons and network meta-analyses were conducted in RevMan and ADDIS. Consistency models were established to identify the differences among different haemostatic strategies, and cumulative probability was used to rank the included strategies. Inconsistencies were also tested using node-splitting models.

RESULTS

Twenty studies from 16 articles (2 articles contained 3 studies each) comprising 1392 patients were included. Direct meta-analysis showed that the LigaSure (SMD = -1.42 [-2.39, -0.44], P = 0.004), bipolar vessel sealing systems (BVSS) (SMD = -0.35 [-0.66, -0.03], P = 0.03), and pituitrin (SMD = -2.13 [-4.14, -0.13], P = 0.04) applications were effective haemostatic strategies. Based on the network meta-analysis and related subgroup analysis of different surgical procedures, the results showed that the application of pituitrin seemed to be the best haemostatic method for hysterectomy (Rank P = 0.64), especially for vaginal hysterectomy (Rank P = 0.72). The application of LigaSure was the best strategy for abdominal hysterectomy (Rank P = 0.54) but was not effective for laparoscopic hysterectomy (direct comparison with BVSS, MD = -31.39 [-146.61, 83.83], P = 0.59). The node-splitting models test revealed that no significant inconsistencies existed in this research.

CONCLUSIONS

Pituitrin application seemed to be the most effective haemostatic strategy for hysterectomy and was especially suitable for vaginal hysterectomy. The best method for reducing blood loss in abdominal hysterectomy was the application of LigaSure.

A comparison of electrothermal bipolar vessel sealing system and electrocautery in selective neck dissection

The use of LigaSure™ vessel sealing system in head and neck surgery was reported to be reliable and safe, providing sufficient hemostasis and reducing operating time. The aim of this study was to evaluate efficacy of this technique in patients undergoing selective neck dissections. This study was carried out as a prospective controlled study at an otolaryngology department of a tertiary medical center between July 2013 and July 2015. Twenty-five patients older than 18 years who underwent unilateral selective neck dissection for head and neck cancer were included in the study. In the control group (group 2, 10 patients) only monopolar and bipolar diathermy was used; in the Ligasure group (group 1, 15 patients) Ligasure was used for hemostasis and dissection in addition to the conventional techniques. Cervical lymphadenectomy time, operation time, preoperative hemoglobin levels, preoperative hematocrit levels, postoperative hemoglobin levels, postoperative hematocrit levels, total neck drainage and drain removal time were analyzed and compared between the groups. Median operation time in group 1 and 2 were 95 min (IQR = 35) and 142.5 min (IQR = 63), respectively. Median cervical lymphadenectomy time in group 1 and 2 were 55 min (IQR = 23) and 102.5 min (IQR = 49), respectively. Median operation time and cervical operation time were significantly lower in group 1 (p < 0.05). In conclusion, LigaSure™ vessel sealing system is a safe, efficacious technique and significantly lowers cervical lymphadenectomy and operation time in selective neck dissections compared to controls. Given the superb hemostatic properties, this technique should be in the surgeon's armamentarium when possible.

Rapid sealing and cutting of porcine blood vessels, ex vivo, using a high-power, 1470-nm diode laser

Suture ligation with subsequent cutting of blood vessels to maintain hemostasis during surgery is time consuming and skill intensive. Energy-based electrosurgical and ultrasonic devices are often used to replace sutures and mechanical clips to provide rapid hemostasis and decrease surgery time. Some of these devices may create undesirably large collateral zones of thermal damage and tissue necrosis, or require separate mechanical blades for cutting. Infrared lasers are currently being explored as alternative energy sources for vessel sealing applications. In a previous study, a 1470-nm laser was used to seal vessels 1 to 6 mm in diameter in 5 s, yielding burst pressures of ∼500  mmHg. The purpose of this study was to provide vessel sealing times comparable with current energy-based devices, incorporate transection of sealed vessels, and demonstrate high vessel burst pressures to provide a safety margin for future clinical use. A 110-W, 1470-nm laser beam was transmitted through a fiber and beam shaping optics, producing a 90-W linear beam 3.0 by 9.5 mm for sealing (400  W/cm2), and 1.1 by 9.6 mm for cutting (1080  W/cm2). A two-step process sealed and then transected ex vivo porcine renal vessels (1.5 to 8.5 mm diameter) in a bench top setup. Seal and cut times were 1.0 s each. A burst pressure system measured seal strength, and histologic measurements of lateral thermal spread were also recorded. All blood vessels tested (n=55 seal samples) were sealed and cut, with total irradiation times of 2.0 s and mean burst pressures of 1305±783  mmHg. Additional unburst vessels were processed for histological analysis, showing a lateral thermal spread of 0.94±0.48  mm (n=14 seal samples). This study demonstrated that an optical-based system is capable of precisely sealing and cutting a wide range of porcine renal vessel sizes and, with further development, may provide an alternative to radiofrequency- and ultrasonic-based vessel sealing devices.

LigaSure vessel sealing system in vaginal hysterectomy: safety, efficacy and limitations

PURPOSE

The aim of this study is to compare vaginal hysterectomy performed with standard technique versus the one performed with LigaSure.

METHODS

Observational-longitudinal-cohort study on 42 women candidates to vaginal hysterectomy because of benign uterine pathology. Outcome variables, methods of analysis, inclusion and exclusion criteria were determined prospectively. Eligible patients were subdivided in Group-A (LigaSure-21 patients), or in Group-B (classical-21 patients). Group-A was divided into Subgroup-A1 (10 patients) and Subgroup-A2 (11 patients), depending on the point where the stump of the uterosacral-ligament was transfixed: Subgroup-A1 at cervical portion, Subgroup-A2 at intermediate portion. For all patients were reported: pre-post surgery haemoglobin and hematocrit, number of sutures, duration of intervention and blood loss, NRS-score on first/third post-operative days. All patients underwent gynaecological examination 30 and 180 days after surgery.

RESULTS

General characteristics did not show significant differences between the two groups. Statistically significant differences emerged from the comparison between Group-A versus Group-B in terms of: intraoperative bleeding, post-operative value of haemoglobin, Δ-Hb, number of sutures, surgical time, pain at first and third post-operative day. The 180 days follow-up demonstrated four cases of vaginal vault prolapse, only in the Subgroup-A1 related to thermal damage of the uterosacral ligament.

CONCLUSION

LigaSure vessel sealing system is a safe alternative for securing pedicles in vaginal hysterectomy with significant improvement in patients outcome. Following vaginal vault prolapse, we determined the optimal fixation-site to perform the colposuspension in the intermediate portion of the uterosacral-ligament, especially if the cervical portion received a thermal damage, as occurs during the LigaSure use.

Randomized clinical trial of vessel sealing system (LigaSure) in esophagogastric devascularization and splenectomy in patients with portal hypertension

BACKGROUND

The LigaSure vessel sealing system (Valleylab, Boulder, CO) has been tested, with excellent results, in different fields of surgery. However, no study has evaluated the efficiency of the LigaSure in open esophagogastric decongestion and splenectomy in a randomized trial to date.

METHODS

Patients scheduled to undergo esophagogastric decongestion and splenectomy were assigned to the use of either the LigaSure or a conventional clamp-and-tie technique. Primary outcome measures were operating time and intraoperative blood loss. Secondary outcome measures were postoperative drainage volume, complications such as spleen fever, bleeding, portal vein thrombosis, length of incision, pain, and time to discharge.

RESULTS

Sixty patients were randomized to the LigaSure (n = 30) and clamp-and-tie (n = 30) groups. The groups were well matched with respect to liver function, associated illnesses, and grading of esophageal varices. Postoperative outcomes in drainage and major complications did not differ between the groups, while operative time and the volume of blood loss were significantly decreased in the LigaSure group compared with the clamp-and-tie group (P < .001).

CONCLUSIONS

The use of the LigaSure is safe and effective in vessel division and homeostasis in the esophagogastric decongestion and splenectomy, with statistically significant decreases in operative time and intraoperative blood loss and without significantly modifying postoperative results.

Efficacy of using electrosurgical bipolar vessel sealing during vaginal hysterectomy in patients with different degrees of operative difficulty: a randomised controlled trial

OBJECTIVE

To assess the efficacy of electrosurgical bipolar vessel sealing using the LigaSure system during vaginal hysterectomy in comparison with conventional suture ligation method.

STUDY DESIGN

103 patients undergoing vaginal hysterectomy for benign conditions were randomised to either LigaSure or Suture groups. Each group was divided into two subgroups according to the degree of surgical difficulty.

RESULTS

Participants in the LigaSure had shorter procedure time (52.5 min vs. 90 min; p<0.001) and less blood loss (230 ml vs. 360 ml; p<0.001). Complication rates were not statistically different between the two groups. The advantage of the LigaSure system in reducing the operative blood loss was more pronounced in the more difficult procedures.

CONCLUSION

The LigaSure system reduces the operating time (by reducing pedicle-securing time) and blood loss without increasing the post-operative complication rates of vaginal hysterectomy. This beneficial effect was found to be more pronounced in difficult procedures.

A review of total laparoscopic hysterectomy using LigaSure uterine artery-sealing device: AIIMS experience

STUDY OBJECTIVE

The aim of this study was to evaluate the efficacy and safety of total laparoscopic hysterectomy (TLH) by using the Ligasure system for the sealing of uterine arteries.

DESIGN

We conducted a retrospective review of cases who underwent TLH over 1.5 years.

SETTINGS

This study was conducted in a tertiary care hospital setting, at the Department of Obstetrics and Gynecology, All India Institute of Medical Sciences (New Delhi, India).

PATIENTS

A total of 110 patients of TLH done for uterine pathology [leiomyoma in 67 (60.9%), dysfunctional uterine bleeding in 34 (30.9%), and others in 9 (8.1%)].

INTERVENTIONS

Total laparoscopic hysterectomy, using the LigaSure system (Valleylab Inc., Boulder, CO), was done by the sealing of uterine arteries and Prashant Mangeshikar uterine manipulator for elevation of the uterus.

RESULTS

The mean age of the patients was 43.1 +/- 0.602 years and mean body mass index was 25.19 +/- 0.39 kg/m(2). The mean operating time was 116.91 +/- 3.4 minutes, mean intraoperative blood loss was 173.09 +/- 11.64 mL, and the mean weight of the removed uterus was 224.14 +/- 17.62 g. Six patients were converted from a laparoscopic to an open procedure (large myoma in 4 and dense adhesion in 2) and 1 was converted to laparoscopically assisted vaginal hysterectomy (tear in vaginal cuff). One patient (0.9%) developed lung emphysema during the intraoperative period. Postoperative complications included paralytic ileus in 3 (2.7%), retention of urine in 2 (1.8%), and febrile morbidity in 12 (10.9%) patients. There were no bladder or bowel injuries.

CONCLUSION

Laparoscopic hysterectomy by uterine artery sealing with LigaSure is a safe, efficient procedure with a low complication rate.

Division of the small bowel with the LigaSure Atlas device during the right laparoscopic colectomy

BACKGROUND

Bowel division and anastomosis were facilitated greatly with the advent of stapling techniques. Since then, there have not been any new evolving technologies to facilitate these maneuvers. For this reason, we recently applied the LigaSure Atlas device (Valleylab, Boulder, CO) to the division of the small bowel during this procedure to obtain a reliable and low-cost division of the ileum.

METHODS

After vessel ligation and ileocolic mobilization, the terminal ileum is sealed and divided with the LigaSure Atlas. This device is applied sequentially along the small bowel twice to ensure an adequate seal before the cut. A terminolateral ileotransversostomy is performed extracorporeally with a mechanical circular stapling device, installing the anvil of the circular stapler into the ileal stump.

RESULTS

We have not encountered any problems with this technique since its introduction in our institution, and no leakage or bursting of the ileal stumps.

CONCLUSIONS

This technique enables an easy, reliable, and inexpensive technical option to optimize the right laparoscopic colectomy procedure.

[Vaginal hysterectomy using electrofusion: a study of 96 cases]

OBJECTIVE

To compare ligature by electrofusion versus sutures in the practice of vaginal hysterectomy.

STUDY DESIGN

This is a retrospective study on 96 patients completed over a period of 47 months. Patients were allocated into two groups: the electrofusion "suture-free" group (n=54) and the "suture" control group (n=42). Designed-end points were operating time, postoperative pain, duration of postoperative hospitalization and perioperative complications.

RESULTS

In the electrofusion group, the operating time was significantly reduced (51.3+/-22.6 min versus 67.6+/-20.1 min) as well as the reported postoperative pain (based on the visual analog scale - VAS) (1.9+/-2.0 versus 3.5+/-2.3). The average morphine consumption rate and the timing of postoperative morphine administration were lower in the electrofusion group (22.4+/-31.0mg versus 45.4+/-51.3 mg and 22.4+/-13.4 h versus 29.4+/-18.8 h, respectively). Moreover, in the electrofusion group there was less need for additional analgesics (1.9+/-2.0 versus 3.5+/-2.3) and the hospital-stay was shorter (4.2+/-1.3 days versus 5.0+/-1.0 days). There was no significant difference between the two groups in regard to perioperative complications.

CONCLUSION

The use of electrofusion in vaginal hysterectomy appears to be a reliable ligation technique which reduces significantly the operating time, the postoperative pain and the length of postoperative hospitalization.

Comparison of the use of electrothermal bipolar vessel sealer with harmonic scalpel in total laparoscopic hysterectomy

AIM

The aim of the present study was to compare the use of electrothermal bipolar vessel sealer (EBVS) with harmonic scalpel (HS) during total laparoscopic hysterectomy with respect to operation time, estimated blood loss and related complications.

METHODS

A retrospective study was conducted in the university hospital. Forty patients who underwent total laparoscopic hysterectomy and bilateral salpingo-oophorectomy were enrolled. Nineteen hysterectomies were performed with HS and in 21 patients the same surgeons used EBVS. Data about the characteristics of the patients, operation time, estimated blood loss, uterine weights, related complications and length of hospital stay were registered and compared.

RESULTS

Mean procedure time and estimated blood loss were significantly less in the EBVS arm (59.57 +/- 3.71 vs 90.95 +/- 5.73 min, P < 0.001; 87.76 +/- 25.48 vs 152.63 +/- 60.90 mL; P < 0.001, respectively). The change in hemoglobin and hematocrit values was found to be more significant in the HS group.

CONCLUSION

EBVS was found to be less time-consuming and caused less bleeding when compared with HS.

Douleur postopératoire après hystérectomie par voie vaginale selon la méthode d'hémostase utilisée: thermofusion ou suture aux fils

OBJECTIVES

The purpose of the study was to compare the postoperative pain of patients who had a hysterectomy through vaginal route according to the process of binding: wire or electrosurgical bipolar vessel sealing.

PATIENTS AND METHODS

Retrospective study carried out in the 60 last patients who underwent a hysterectomy by vaginal route for a benign pathology in the gynaecological service of surgery of the CHI Poissy-Saint-Germain-en-Laye until March 2006. Among these patients, 32 had profited from a binding by wire and 28 of the electrosurgical bipolar vessel sealing. The studied criteria were the post-operative pain, total morphine consumption and the durations of the analgesic treatment, the hospitalisation and intervention time.

RESULTS

The postoperative pain in the first 24 hours was twice lower using thermofusion; it was valid in immediate post-operative period and after 24 hours. In addition, total morphine consumption was also significantly lower using thermofusion.

DISCUSSION AND CONCLUSION

This pilot study shows that the electrosurgical bipolar vessel sealing allows a reduction in the pain into the immediate postoperative period. Other prospective and randomised studies would allow it and conclude on the duration of hospitalisation, the quality of life from the patients and the cost in terms of public health.

USE OF THE LIGASURE VESSEL SEALING SYSTEM IN LAPAROSCOPIC ADRENALECTOMY

Laparoscopic adrenalectomy is the operation of choice for benign adrenal lesions. During laparoscopic surgery, vessels are usually ligated with diathermy, ligaclips, staplers or ultrasonic coagulators. Use of the electrothermal bipolar vessel sealer (LigaSure; Valleylab, Boulder, CO, USA) has recently been described in a variety of procedures, not including adrenalectomy. This article is a retrospective study of 28 patients undergoing laparoscopic adrenalectomy within the University of Sydney Endocrine Surgical Unit at the Royal North Shore Hospital using the LigaSure vessel sealing system. Between July 2004 and August 2005, 28 consecutive patients underwent laparoscopic adrenalectomy using the LigaSure vessel sealing system to divide feeding adrenal vessels as well as the adrenal vein. There were no bleeding complications. The LigaSure vessel sealing system can be safely used to secure haemostasis, including division of the adrenal vein, in laparoscopic adrenalectomy.