[Multicentre epidemiological study of anaesthetic techniques in inguinal hernia surgery in Spain]

Survey on the practice of anaesthesiologists in inguinal hernia surgery in Galicia

OBJECTIVES

To evaluate the preference in the anaesthetic technique by anaesthesiologists for the management of inguinal hernia surgery in Galicia.

MATERIAL AND METHODS

Using the National Catalogue of Hospitals of the Ministry of Health and Consumer Affairs in Galicia, a questionnair was sent to the Heads of Anaesthesiology Service and Coordinators of the Postanaesthesia Care Unit (PACU) with 11 questions on the anaesthetic technique chosen by anaesthesiologists in the management of patients for inguinal hernia surgery, as well as their reasons.

RESULTS

The questionnaire was sent to 11 hospitals: 8 with PACU and 3 District. A total of 94 professionals responded, 56% with more than 10 years of experience, who performed between 8-10 procedures/month (58%) on an outpatient basis (61.54%). The most used anaesthetic technique was intradural in 52.8%, compared to 41.8% of general anaesthesia. Respondents with more than 10 years of experience preferred spinal anaesthesia in 38.6% of cases, compared to those with less experience (6.8%) (P=.037). One in 4 of those who chose general anaesthesia used ultrasound-guided interfascial blocks (27.5%). The local anaesthetic most used in intradural anaesthesia was hyperbaric bupivacaine (70.8%) at doses higher than 7mg.

CONCLUSION

Intradural anaesthesia with hyperbaric bupivacaine was the technique most chosen by anaesthesiologists for the management of inguinal hernia surgery. The anaesthetic techniques chosen among the different hospitals did not follow a homogenous distribution. In this survey, there was a tendency to choose the technique associated with the experience of the anaesthesiologist.

Ultrasound-guided transversalis fascia plane block versus anterior transversus abdominis plane block in outpatient inguinal hernia repair

INTRODUCTION

The aim of the study was to assess the effectiveness of ultrasound-guided transversalis fascia plane block (TFP) compared to anterior transversus abdominis plane block (TAP-A) for post-operative analgesia in outpatient unilateral inguinal hernia repair.

MATERIALS AND METHODS

Retrospective observational study conducted on ASA I-II patients. Two groups (TAP-A and TFP), which were given 30ml of 0.25% levobupivacaine prior to surgical incision. The primary endpoint was the post-operative pain evaluated by verbal numerical scale (VRN at rest and movement) at 10, 30, 60, 90min, coinciding with ambulation, and 24hours by telephone. An evaluation was also made of the sensory block level reached prior to surgery, the need for additional analgesia, side effects, ease of performing the technique, and the level of satisfaction of patients with the anaesthetic-analgesic technique.

RESULTS

A total of 61 patients were included, 30 patients in the TAP-A group and 31 in the TFP group. The analgesic efficacy obtained in both groups was similar, although some higher values were found in the VNR on moving in the TAP-A group, reaching statistical difference at 10minutes (P=.014) and 30minutes (P=.013) post-operatively. A higher level of sensory block was achieved in the TFP group than in the TAP-A group (P<.01). There were no significant differences in additional analgesia requirements, and the cumulative dose of morphine was similar in both groups in the post-operative period. There were no differences in side effects or complications. The technical ease of the block was similar in both groups and the level of satisfaction of patients very high.

CONCLUSIONS

Both blocks with a multimodal approach achieve good post-operative analgesia of inguinal hernia repair, are easy to perform and have few complications. TFP achieves the highest sensory level, but there are no differences in the requirements for additional analgesia.

[Spinal anesthesia versus general anesthesia in the surgical treatment of inguinal hernia. Cost-effectiveness analysis]

OBJECTIVE

To compare the costs related to the clinical effectiveness of general anesthesia versus spinal anesthesia in inguinal hernioplasty ambulatory surgery.

MATERIAL AND METHODS

An observational, retrospective cohort study measurement and analysis of cost-effectiveness, in the ambulatory surgery unit of a general hospital. All patients over 18 years of age diagnosed with primary inguinal hernia and scheduled for unilateral hernioplasty between January 2010 and December 2011 were included. Duration of anesthetic induction, length of stay in both the operating room, and in the post-anesthesia care unit, the anesthetic effectiveness (the incidence of adverse effects and the patient's comfort level), and variable economic costs associated with the use of drugs, as well as the use of human resources, were compared.

RESULTS

The final analysis included 218 patients, 87.2% male, with a mean age of 53 years (range: 18-85 years). Of these, 139 (63.76%) received subarachnoid anesthesia and 79,(36.2%) general anesthesia. The length of time a patient remained in the post-anesthesia care unit was 337.6±160.2min in the subarachnoid anesthesia group, and 210.0±97.5min for the general anesthesia group (P<.001). Costs of drugs for general anesthesia were higher than that for subarachnoid anesthesia (86.2±8.3 vs. 18.7±7.2). The total cost difference between the 2 techniques was €115.8 more for subarachnoid anesthesia (P<.001).

CONCLUSIONS

Both techniques showed similar effectiveness. The overall costs for subarachnoid anesthesia were greater than for the general. The cost-effectiveness of general anesthesia is better for outpatient inguinal hernia repair surgery.