Accidental Spinal Cord Injury Following an Attempted Thoracic Epidural for acute Pancreatitis Pain Management

Conventional anatomical landmark versus preprocedural ultrasound for thoracic epidural analgesia: A systematic review and meta-analysis

BACKGROUND

Thoracic epidural analgesia is the gold standard for major thoracic and abdominal surgeries.

AIM

Ultrasound-guided and landmark-based thoracic epidural insertion are compared in this systematic review.

METHODS

Randomised controlled trials were sought in six databases for a systematic review and meta-analysis. With a 95% confidence interval, a fixed-effects model calculated risk ratio or mean difference. Cochrane risk of bias assessed bias. Four randomised controlled trials were examined.

FINDINGS

Preprocedural ultrasound increased thoracic epidural placement first-puncture success rate (risk ratio = 1.28, 95% confidence interval (1.05 to 1.56), p value = 0.02) and decreased the need for two or more skin punctures (mean difference = -2.41, 95% confidence interval (-3.34 to -1.47), p value = 0.00001). The ultrasound group reduced needle redirections (risk ratio = 0.6, 95% confidence interval (0.38 to 0.94), p value = 0.02). The epidural block success rate was equal in both groups (risk ratio = 1.02, 95% confidence interval (0.96 to 1.07), p value = 0.6).

CONCLUSION

Thoracic epidural insertion is improved by ultrasound but not the success rate. Quality research with larger samples is needed to emphasise these conclusions.

Spinal Cord Injury and Complications Related to Neuraxial Anaesthesia Procedures: A Systematic Review

The use of neuraxial procedures, such as spinal and epidural anaesthesia, has been linked to some possible complications. In addition, spinal cord injuries due to anaesthetic practice (Anaes-SCI) are rare events but remain a significant concern for many patients undergoing surgery. This systematic review aimed to identify high-risk patients summarise the causes, consequences, and management/recommendations of SCI due to neuraxial techniques in anaesthesia. A comprehensive search of the literature was conducted in accordance with Cochrane recommendations, and inclusion criteria were applied to identify relevant studies. From the 384 studies initially screened, 31 were critically appraised, and the data were extracted and analysed. The results of this review suggest that the main risk factors reported were extremes of age, obesity, and diabetes. Anaes-SCI was reported as a consequence of hematoma, trauma, abscess, ischemia, and infarction, among others. As a result, mainly motor deficits, sensory loss, and pain were reported. Many authors reported delayed treatments to resolve Anaes-SCI. Despite the potential complications, neuraxial techniques are still one of the best options for opioid-sparing pain prevention and management, reducing patients' morbidity, improving outcomes, reducing the length of hospital stay, and pain chronification, with a consequent economic benefit. The main findings of this review highlight the importance of careful patient management and close monitoring during neuraxial anaesthesia procedures to minimise the risk of spinal cord injury and complications.

Safety of Thermosensor Insertion in the Midline of the Spinal Canal Anterior to the Dura: A Cadaveric Study

OBJECTIVE

To evaluate the safety of the insertion of a blunt-tip thermosensor inside the anterior epidural space using the trans-osseous route in the dorsal spine and the double oblique trans-foraminal approach in the lumbar spine.

MATERIALS AND METHODS

A total of 10 attempts were made on a 91 years old human specimen. Thermosensors were inserted under fluoroscopic guidance in the anterior part of the spinal canal using various oblique angulations. Surgical dissection was then performed to identify the position of the thermosensor and look for any injury to the dural sac or the spinal cord/cauda equina.

RESULTS

Nine thermosensors could be deployed successfully in the anterior part of the spinal canal from Th8 to L5 while one attempt (L5 level) failed due to a technical issue on the coaxial needle. On anteroposterior projection, the tip of thermosensor relative to the midline was classified as centered in 5 cases, overcrossing in 3 cases and undercrossing in 1 case. At surgical dissection, the tip of the thermosensor was epidural posterior to the posterior longitudinal ligament in 8 cases and anterior to the longitudinal ligament in 1 case (the undercrossing case). There were 3 tears to the dura, all in the overcrossing group. There was no case of injury to the spinal cord/cauda equina.

CONCLUSION

Insertion of a thin blunt-tip thermosensor with optimal angulation leads to an epidural post-ligamentous position on the midline without damage to the dural sac. The blunt-tip did not prevent from dural tearing should the insertion overcross the midline.