Low-pressure capnoperitoneum reduces stress responses during pediatric laparoscopic high ligation of indirect inguinal hernia sac: A randomized controlled study

Effects of deep neuromuscular block on surgical pleth index-guided remifentanil administration in laparoscopic herniorrhaphy: a prospective randomized trial

Deep neuromuscular block (NMB) has been increasingly utilized, but its role in reducing intraoperative opioid requirement has yet to be investigated. Surgical pleth index (SPI) quantifies nociception. We investigated the effects of deep NMB on SPI-guided remifentanil administration in laparoscopic herniorrhaphy. Total 128 patients undergoing laparoscopic inguinal herniorrhaphy were randomly allocated to two groups of NMB: deep (n = 64) and moderate (n = 64). The remifentanil dose was assessed during intubation, from skin incision until CO₂ insertion, and pneumoperitoneum. Mean infusion rate of remifentanil during pneumoperitoneum was higher in moderate NMB group than in deep NMB group (0.103 [0.075-0.143] µg/kg/min vs. 0.073 [0.056-0.097] µg/kg/min, p < 0.001). Consequently, median infusion rate of remifentanil during anesthesia was higher in moderate NMB group (0.076 [0.096-0.067] µg/kg/min vs. 0.067 [0.084-0.058] µg/kg/min, p = 0.016). The duration of post-anesthesia care unit stay was longer in the moderate NMB group (40 [30-40] min vs. 30 [30-40] min, p = 0.045). In conclusion, deep NMB reduced the remifentanil requirement compared with moderate NMB in SPI-guided anesthesia for laparoscopic herniorrhaphy.

Multifactor study of efficacy and recurrence in laparoscopic surgery for inguinal hernia

BACKGROUND

Inguinal hernia is a common clinical manifestation in children with a low self-healing rate.

AIM

To determine the effect of laparoscopic surgery on indirect inguinal hernia and the risk factors for postoperative recurrence and to provide a reference for the clinical treatment and prevention of recurrence.

METHODS

We selected 360 children who underwent laparoscopic high ligation in our hospital as the laparoscopic group and 120 patients treated for inguinal hernia with conventional surgery as the control group. The operation time, blood loss, incision length, hospitalization time, total hospitalization cost and surgical complications were compared between the two groups. According to telephone follow-up or return visits, the children who had recurrence within 2 years after the operation in the laparoscopic group were analyzed, and the laparoscopic high ligation hernia sac level was analyzed by the logistic multifactor method. Ligation was used to treat recurrence in children with inguinal hernia.

RESULTS

The operation time, blood loss, length of incision, and length of hospital stay in the laparoscopic group were lower than those in the control group (P < 0.05). The total hospitalization cost in the laparoscopic group was higher than that in the control group (P < 0.05). The operative complication rate was 1.67% lower than that in the control group (12.50%) (P < 0.05). In 360 children with laparoscopic high ligation of the hernia sac, 14 patients had recurrence within 2 years after surgery. After analysis, 14 cases in the recurrence group did not recur. The preoperative incarceration rate, inner ring diameter, ligature use and age difference were statistically significant (P < 0.05). According to logistic regression multivariate analysis, an inner ring diameter ≥ 1.0 cm, the use of an absorbable ligature line and age > 3 years increased the risk of postoperative recurrence in children with inguinal hernia after laparoscopic high ligation of the hernia sac (P < 0.05).

CONCLUSION

Laparoscopic surgery for indirect inguinal hernia in children has the advantages of low trauma and a rapid postoperative recovery. An inner ring diameter ≥ 1.0 cm, the use of absorbable ligature, and age > 3 years may increase the risk of recurrence after laparoscopic high ligation of the hernia sac.

Comparison of 3 Minimally Invasive Methods Versus Open Distal Pancreatectomy: A Systematic Review and Network Meta-Analysis

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The efficacy and safety of open distal pancreatectomy (DP), laparoscopic DP, robot-assisted laparoscopic DP, and robotic DP have not been established. The authors aimed to comprehensively compare these 4 surgical methods using a network meta-analysis.

Single-incision approach for bilateral inguinal hernia repair in children: A retrospective study

To introduce the use of a new surgical approach named single-incision bilateral inguinal herniorrhaphy (SBIH) in pediatric surgical population.This was a STROBE-compliant retrospective cohort study using data from 101 patients who had undergone bilateral inguinal herniorrhaphy in our institution. Children with bilateral inguinal hernias without contraindications for surgery, ranging in age from 6 months to 12 years, were included. Fifty-six children with bilateral inguinal hernias underwent SBIH (SBIH group) and 45 patients underwent laparoscopic bilateral inguinal herniorrhaphy (LBIH) (LBIH group). Differences in operative time, postoperative pain, recurrence, and complications between the 2 groups were analyzed. Patient satisfaction with cosmetic result was also investigated using questionnaires.There were no statistically significant differences in operative time (P = .2257), postoperative pain (P = .0607), recurrence (P = .8756), and complications (P = .7467) between the 2 groups. Interestingly, the operation time of girls in SBIH group was significantly shorter than that of the boys in this group (P < .0001), but also shorter than that of girls in LBIH group (P = .0038). Postoperative pain for boys was lower in SBIH group than in the LBIH group (P = .0340). No ascending testis, testicular atrophy, and hydrocele occurred in either group. According to the questionnaire, both procedures had equally high levels of satisfaction for cosmetic results (P = .7531).Initial results show that SBIH for pediatric patients, regardless of gender, is a safe and feasible procedure compared with LBIH with an equally low recurrence rate, few complication, and satisfactory cosmetic outcomes.

Establishment of a rat ovarian peritoneal metastasis model to study pressurized intraperitoneal aerosol chemotherapy (PIPAC)

BACKGROUND

pressurized intraperitoneal aerosol chemotherapy (PIPAC), with or without electrostatic precipitation (ePIPAC), was recently introduced in the treatment of peritoneal metastases (PM) from ovarian cancer (OC). Preliminary clinical data are promising, but several methodological issues as well the anticancer efficacy of PIPAC remain unaddressed. Here, we propose a rat ePIPAC model that allows to study these issues in a clinically relevant, reproducible, and high throughput model.

METHODS

laparoscopy and PIPAC were established in healthy Wistar rats. Aerosol properties were measured using laser diffraction spectrometry based granulometric analyses. Electrostatic precipitation was accomplished using a commercially available generator (Ultravision™). A xenograft model of ovarian PM was created in athymic rats using intraperitoneal (IP) injection of SKOV-3 luciferase positive cells. Tumor growth was monitored weekly by in vivo bioluminescence imaging.

RESULTS

PIPAC and electrostatic precipitation were well tolerated using a capnoperitoneum of 8 mmHg. All rats survived the (e)PIPAC procedure and no gas or aerosol leakage was observed over the entire procedure. With an injection pressure of 20 bar, granulometry showed a mean droplet diameter (D(v,0.5)) of 47 μm with a flow rate of 0.5 mL/s, and a significantly lower diameter (30 μm) when a flow rate of 0.8 mL/s was used. Experiments using IP injection of SKOV-3 luciferase positive cells showed that after IP injection of 20 × 10⁶ cells, miliary PM was observed in all animals. PIPAC was feasible and well supported in these tumor bearing animals.

CONCLUSIONS

we propose a reproducible and efficient rodent model to study PIPAC and ePIPAC in OC xenografts with widespread PM. This model allows to characterize and optimize pharmacokinetic and biophysical parameters, and to evaluate the anti-cancer efficacy of (e)PIPAC treatment.

Physiologic Changes in a Small Animal Model for Neonatal Minimally Invasive Surgery

BACKGROUND

Minimally invasive surgery (MIS) has gained increasing importance in neonatal surgery but the effects on neonatal physiology remain unclear. We aimed to characterize the impact of capnoperitoneum on physiologic parameters in a small animal model for neonatal MIS.

MATERIAL AND METHODS

Twenty-four 10-day-old Sprague Dawley rats underwent inhalative anesthesia (1% isoflurane in 100% O₂ 250 mL/minutes) and were allowed to breathe spontaneously. CO₂ was insufflated into the abdominal cavity for 1 hour via a 24G cannula. Anesthetized litter mates without insufflation served as sham controls, those without any treatment as external controls. Continuous monitoring included O₂-saturation, heart and respiration rate, pulse and breath distension. After euthanasia, blood gas analysis was performed.

RESULTS

All animals survived the experiment. Capnoperitoneum was best tolerated at a pressure of 2 mmHg and a flow of 0.5 L/minutes. A significant decrease in heart rate was observed within the first 30 minutes of insufflation comparing the CO₂ and sham group (P < .05). In both, the CO₂ and sham group, postmortem pH-levels were lower and pCO₂ levels were higher compared to external controls (P < .05). Additionally, levels of pCO₂ were higher but pH levels remained unchanged in the CO₂ compared to sham group (P < .05).

CONCLUSION

We established a small animal model for neonatal laparoscopy. A pressure of 2 mmHg and flow of 0.5 L/minutes induced physiologic alterations but was well tolerated by the animals. These settings can be used in future studies on the impact of the capnoperitoneum in neonatal MIS.