To blunt or not to blunt: Still an outlawed practice in peripheral nerve blocks?

Probably the first published account of regional nerve blocks was by Gaston Labat in 1922. Since the earlier experimentation, regional anesthesia has seen many ups and downs. The concept of field anesthesia popularized by the military anesthesiologists to be used in the battlefields, was quickly picked up by their colleagues working in the civil hospitals. The real breakthrough was brought about the invention of block needles to be used specifically for the peripheral nerve blocks, and proved to be safer than ordinary hypodermic syringe needles. The block needles, however, come at a higher price and the availability remains a constant problem, especially in the remote places of the low-income countries. The next revolution came with the advent of nerve stimulator and the ultrasound in the block techniques. Both of these developments really revolutionized the art of regional anesthesia. The authors describe a technique of use of blunted stylets of the ordinary intravenous cannulas. The technique can be used if resources are scarce, and with proper sterilization.

Percutaneous Interventional Strategies for Migraine Prevention: A Systematic Review and Practice Guideline.

OBJECTIVE: To systematically evaluate the efficacy and effectiveness of percutaneous interventional treatments for prevention of migraine through a qualitative and (when possible) quantitative analysis. METHODS: An expert panel was asked to develop recommendations for the multidisciplinary preventive treatment of migraine, including interventional strategies. The committee conducted a systematic review and (when evidence was sufficient) a meta-analytic review by using the Grading of Recommendations, Assessment, Development and Evaluations (GRADE) criteria and the modified Cochrane Risk of Bias analysis available in the Covidence data management program. Clinical questions addressed adults with migraine who should be offered prevention. Examined outcomes included headache days, acute medication use, and functional impairment. Acute management of migraine was outside the scope of this guideline. RESULTS: The committee screened 1,195 studies and assessed 352 by full text, yielding 16 randomized controlled trials that met the inclusion criteria. RECOMMENDATIONS AND CONCLUSIONS: As informed by evidence related to the preselected outcomes, adverse event profile, cost, and values and preferences of patients, onabotulinumtoxinA received a strong recommendation for its use for chronic migraine prevention and a weak recommendation against its use for episodic migraine prevention. Greater occipital nerve blocks received a weak recommendation for their use for chronic migraine prevention. For greater occipital nerve block, steroid received a weak recommendation against its use vs the use of local anesthetic alone. Occipital nerve with supraorbital nerve blocks, sphenopalatine ganglion blocks, cervical spine percutaneous interventions, and implantable stimulation all received weak recommendations for their use for chronic migraine prevention. The committee found insufficient evidence to assess trigger point injections in migraine prevention and highly discouraged the use of intrathecal medication.

Regional Anesthesia Practices in Turkey During the COVID-19 Pandemic.

Introduction The aim of the survey was to investigate the changes, methods, and preferences in regional anesthesia (RA) applications during the COVID-19 pandemic in Turkey. Methods The questionnaire prepared on surveymonkey.com was sent to anesthesiology and reanimation specialists by e-mail. Results A total of 126 physicians participated in the study. Forty-two point sixty-two percent (42.62%) of the participants reported an increase in RA practices in their clinical anesthesia applications, whereas 57.38% did not state any change. Neuraxial anesthesia was determined to be the most preferred RA application, with a rate of 74%. The distribution of peripheral nerve blocks (PNBs) showed that upper extremity blocks were used at a rate of 64.9%, lower extremity blocks at 30.38%, and trunk blocks at 15%. Investigation of neurostimulator (NS) and/or ultrasound (US) use with PNB showed that 44% of the participants used only US while 50% used both US and NS. Conclusion Neuraxial blocks play an important role in RA applications. PNB comprise one-quarter of RA applications during the pandemic. The importance of ultrasound has gradually increased in RA applications worldwide, as well as in Turkey, during the pandemic.