Post-dural puncture headache: pathogenesis, prevention and treatment

Risk Factors Associated with Postoperative Cerebrospinal Fluid Leaks After Intrathecal Drug Delivery System and an External Pump Implantation in Cancer Patients: A Retrospective Study

INTRODUCTION

To determine risk factors associated with postoperative cerebrospinal fluid leaks (CSFLs) after intrathecal drug delivery system (IDDS) and external pump implantation.

METHODS

The clinical data of 248 patients with advanced cancer who underwent IDDS implantation from January 2021 to December 2022 at the Department of Pain Medicine at the Hunan Cancer Hospital were retrospectively reviewed. Information regarding age, gender, height, weight, body mass index (BMI), tumour type, albumin levels, haemoglobin levels, history of diabetes and pre- and postoperative anti-tumour therapy was collected and analysed.

RESULTS

Postoperative CSFLs occurred in 7 of 231 patients (3.30%). Statistical analysis indicated that gender, age, height, weight, BMI, tumour type, albumin levels, haemoglobin levels, history of diabetes, pre- and postoperative chemotherapy, pre- and postoperative radiotherapy, preoperative immunotherapy and postoperative targeted therapy were not independent factors for CSFLs. Preoperative targeted therapy [odds ratio (OR): 16.64; 95% confidence interval (CI): 1.42, 195.56; P = 0.01] and postoperative immunotherapy (OR: 13.38; 95% CI: 1.60, 111.65; P = 0.017) were factors associated with an increased postoperative CSFL rate. Of the two locations where CSFLs can occur, the back (puncture site of catheter, n = 4) and the hypochondriac region (location of infusion port implanted, n = 3), back CSFLs occurred earlier than in the hypochondriac region (18.25 ± 6.45 vs 115 ± 62.02 days, P = 0.032).

CONCLUSION

Based on the data from our study, the timing of preoperative targeted therapy and postoperative immunotherapy should be considered to prevent the occurrence of CSFLs in cancer pain patients who have an IDDS and external pump.

Prophylactic effect of chamomile on post-dural puncture headache in women undergoing elective cesarean section: A randomized, double blind, placebo-controlled clinical trial

BACKGROUND

Post-dural puncture headache (PDPH) is a common complication after spinal anesthesia, affecting patient recovery. This study evaluated the prophylactic effect of topical chamomile ointment on PDPH in women undergoing elective cesarean section.

METHODS

In a randomized, double-blind, placebo-controlled clinical trial 148 pregnant women were randomized into two parallel groups and received 3cc of the chamomile or the placebo ointment on the forehead of the participants 20 minutes before the start of spinal anesthesia, and then 2 and 4 hours after that. The primary outcomes were the incidence rate of headache, and its severity assessed by a numeric rating scale (NRS), while secondary outcomes included analgesic consumption, frequency of nausea/vomiting, and adverse events.

RESULTS

Chamomile ointment exhibited significant preventive effects on PDPH incidence compared to placebo. The chamomile group demonstrated lower rates of PDPH at 6 hours (3.5% vs. 7.18%, p = 0.021) and 12 hours (7.6% vs. 20%, p = 0.028) after spinal anesthesia. Analgesic consumption, frequency of nausea/vomiting, and adverse events were comparable between the groups.

CONCLUSION

Topical chamomile ointment demonstrated significant preventive effects on PDPH incidence compared to placebo. Chamomile ointment could be a promising adjunctive approach to prevent PDPH, enhancing patient comfort and potentially reducing the need for analgesics. Further investigation is needed to explore its mechanisms and broader applications.

Optic nerve sheath diameter measurement for prediction of postdural puncture headache

PURPOSE

Intracranial hypotension due to cerebrospinal fluid leak is mainly the causal factor for the pathophysiology of postdural puncture headache (PDPH). In this study, we aimed to evaluate the effectiveness of optic nerve sheath diameter (ONSD) measurement in predicting the development of PDPH in patients undergoing spinal anesthesia.

METHODS

According to the American Society of Anesthesiology (ASA) physical classification I-III, 83 patients aged 18-65 years scheduled for spinal anesthesia for elective surgery were included in the study. Demographic data (age, ASA, sex, smoking, migraine, and PDPH history) and operative data were recorded. Preoperative ONSD measurements were taken in the right and left eye, axial, and sagittal planes. The mean of four measurements was recorded before and 24 h after the spinal anesthesia.

RESULTS

A total of 83 patients (59 males and 24 females) were included in the study. In our study, the rate of PDPH development was determined as 22.9% (n = 19). There was a statistically significant difference in the preoperative and postoperative ONSD values between patients with and without PDPH development (p = 0.046). In the receiver operating characteristic analysis, the area under the curve was 0.843, and the cutoff value was 0.4.

CONCLUSION

The difference between the ONSD values measured before and after spinal anesthesia may be an important parameter for predicting the risk of PDPH development.

Factors associated with an inadvertent dural puncture or post-dural puncture headache following labour epidural analgesia: A retrospective cohort study

Inadvertent dural puncture and post-dural puncture headache are complications of labour epidural analgesia and may result in acute and chronic morbidity. Identification of risk factors may enable pre-emptive management and reduce associated morbidity. In this retrospective cohort study, we aimed to identify factors associated with an inadvertent dural puncture or post-dural puncture headache by identifying parturients who received labour epidural analgesia from January 2017 to December 2021. The primary outcome was any witnessed inadvertent dural puncture, inadvertent placement of an intrathecal catheter, clinical diagnosis of post-dural puncture headache, or headache that was assessed to have characteristic post-dural puncture headache features. A wide range of demographic, obstetric, and anaesthetic factors were analysed using univariate and multivariable analyses to identify independent associations with the primary outcome. Data from 26,395 parturients were analysed, of whom 94 (0.36%) had the primary outcome. Within these 94 parturients, 26 (27.7%) had inadvertent dural puncture, 30 (31.9%) had inadvertent intrathecal catheter, and 38 (40.4%) had post-dural puncture headache without documented inadvertent dural puncture or intrathecal catheter insertion. Increased number of procedure attempts (adjusted odds ratio 1.39, 95% confidence interval 1.19 to 1.63), longer procedure duration adjusted odds ratio 1.03, 95% confidence interval 1.01 to 1.05), increased depth of epidural space (adjusted odds ratio 1.10, 95% confidence interval 1.04 to 1.18), greater post-procedure Bromage score (adjusted odds ratio 7.70, 95% confidence interval 4.22 to 14.05), and breakthrough pain (adjusted odds ratio 3.97, 95% confidence interval 2.59 to 6.08) were independently associated with increased odds of the primary outcome, while the use of standard patient-controlled epidural analgesia (PCEA) regimen (adjusted odds ratio 0.50, 95%confidence interval 0.31 to 0.81), increased concentration of ropivacaine (adjusted odds ratio 0.08 per 0.1%, 95% confidence interval 0.02 to 0.46), and greater satisfaction score (adjusted odds ratio 0.96, 95% confidence interval 0.95 to 0.97) were associated with reduced odds. The area under curve of this multivariable model was 0.83. We identified independent association factors suggesting that greater epidural depth and procedure difficulty may increase the odds of inadvertent dural puncture or post-dural puncture headache.

Management of Post-Dural Puncture Headaches in Pediatric Patients with Epidural Blood or Saline Patch: An Educational Focused Review

Post-dural puncture headache (PDPH) is a common adverse outcome following puncture of the dura. It can occur after inadvertent dural puncture during epidural catheter placement or following diagnostic or therapeutic LP. The incidence of PDPH in pediatric patients has been estimated at 1-15% depending on patient factors (age, gender, body mass index) and needle factors (size and needle bevel/point type). The larger the needle gauge, the higher the incidence of PDPH. Various options have been proposed to treat PDPH including observation, bed rest, hydration, caffeine, and epidural blood/saline patch. The current manuscript provides a review of the use of epidural blood/saline patch in pediatric-aged patients with PDPH.

Preferences of Patients with Amyotrophic Lateral Sclerosis for Intrathecal Drug Delivery: Choosing between an Implanted Drug-Delivery Device and Therapeutic Lumbar Puncture

BACKGROUND

Novel intrathecal treatments for amyotrophic lateral sclerosis (ALS) may require delivery using lumbar puncture (LP). Implanted drug-delivery devices (IDDDs) could be an alternative but little is known about patients' preferences for intrathecal drug-delivery methods.

OBJECTIVE

We aimed to elicit preferences of patients with ALS for routine LP and IDDD use.

METHODS

A discrete choice experiment (DCE) and a threshold technique (TT) exercise were conducted online among patients with ALS in the US and Europe. In the DCE, patients made trade-offs between administration attributes. Attributes were identified from qualitative interviews. The TT elicited maximum acceptable risks (MARs) of complications from device implantation surgery. DCE data were analyzed using mixed logit to quantify relative attribute importance (RAI) as the maximum contribution of each attribute to a preference, and to estimate MARs of device failure. TT data were analyzed using interval regression. Four scenarios of LP and IDDD were compared.

RESULTS

Participants (N = 295) had a mean age of 57.7 years; most (74.2%) were diagnosed < 3 years ago. Preferences were affected by device failure risk (RAI 28.6%), administration frequency (26.4%), administration risk (19.7%), overall duration (17.8%), and appointment location (7.5%). Patients accepted a 5.6% device failure risk to reduce overall duration from 2 h to 30 min and a 3.6% risk for administration in a local clinic instead of a hospital. The average MAR of complications from implantation surgery was 29%. Patients preferred IDDD over LP in three of four scenarios.

CONCLUSION

Patients considered an IDDD as a valuable alternative to LP in multiple clinical settings.

Ultrasonic optic nerve sheath diameter can be used as a diagnostic measure after accidental dural puncture during cesarean section: a case report

BACKGROUND

Parturients are prone to postdural puncture headache (PDPH) after epidural puncture. Cerebral venous sinus thrombosis (CVST) is a fatal complication of PDPH. The main symptom of both is headache, however, the mechanism is not similar. For persistent PDPH, early differential diagnosis from CVST is essential. Optic nerve sheath diameter (ONSD) measurements can be used to identify changes in intracranial pressure as an auxiliary tool to distinguish the cause of headache.

CASE PRESENTATION

The dura of a 32-year-old woman undergoing cesarean section was accidentally penetrated while administering epidural anesthesia, and the patient developed PDPH the subsequent day. The patient refused epidural blood patch (EBP) treatment and was discharged after conservative treatment. Fourteen days post-discharge, she was readmitted for a seizure. Magnetic resonance imaging (MRI) and Magnetic resonance angiography (MRA) indicated low cranial pressure syndrome and superior sagittal sinus thrombosis with acute infarction. The next morning, the EBP was performed with 15 ml autologous blood. Subsequently, the headache symptoms decreased during the day and worsened at night. ONSD measurement suggested dilation of the optic nerve sheath, and subsequently, the patient showed intracranial hypertension with papilledema. After dehydration and anticoagulant treatment, the patient's symptoms were relieved and she was discharged from the hospital 49 days later.

CONCLUSIONS

Headache is the main symptom of PDPH and cerebral venous thrombosis, which are difficult to distinguish. ONSD measurement may help to estimate the intracranial pressure, and early measurement may be helpful for women with PDPH to avoid serious complications, such as CVST.

Intranasal Lidocaine Administration via Mucosal Atomization Device: A Simple and Successful Treatment for Postdural Puncture Headache in Obstetric Patients

(1) Background: Postdural puncture headache (PDPH) remains a serious complication in obstetric patients. While the epidural blood patch represents the current gold standard in therapy, a growing number of alternative measures are thought to be beneficial for clinical management. The purpose of this study was to retrospectively analyze the efficacy of intranasal lidocaine administration to treat PDPH in obstetrics at our university hospital; (2) Methods: A retrospective analysis of the medical records of patients with PDPH has been performed focusing on the techniques of administration, dosing, treatment duration, impact on pain intensity as well as side effects of intranasal lidocaine; (3) Results: During the study period, 5610 obstetric patients received neuraxial anesthesia, of whom 43 (0.77%) developed PDPH. About one third of the patients with PDPH after spinal anesthesia (n = 8), epidural anesthesia (n = 5) or both (n = 2) were treated with intranasal lidocaine. Lidocaine was administered either via gauze compresses (GC, n = 4), a mucosal atomization device (MAD, n = 8) or with a second-line mucosal atomization device due to low gauze compress efficacy (n = 3). All patients treated with lidocaine refused the epidural blood patch. Nebulization of lidocaine resulted in a significant reduction in pain intensity after the first dose (p = 0.008). No relevant side effects developed except sporadic temporal pharyngeal numbness. The utilization of the mucosal atomization device averted the necessity for an epidural blood patch, whether employed as the primary or secondary approach; (4) Conclusions: Our data imply that the mucosal atomization device enhances the efficacy of intranasal lidocaine administration in obstetric patients suffering from PDPH.

Update and Advances on Post-dural Puncture Headache

This document provides an overview of post-dural puncture headache (PDPH), covering its historical perspective, anatomy and physiology of cerebrospinal fluid (CSF), pathophysiology, risk factors, diagnosis, and treatment options. PDPH is a common complication of dural puncture, characterized by a postural headache due to CSF leakage. The understanding of CSF and dural anatomy has evolved over time, leading to advancements in diagnosing and managing PDPH. Treatment options range from conservative measures to epidural blood patch, intrathecal catheter, and regional techniques like sphenopalatine ganglion block and greater occipital nerve block. Further research is needed to optimize treatment approaches and improve patient outcomes.

Risk Factors in Administering Spinal Anesthesia: A Comprehensive Review

Numerous advantages, including a quick start and consistent anesthesia, are provided by spinal anesthesia, a method often utilized in contemporary medicine for various surgical operations. However, it has some hazards, just like any medical procedure. With an emphasis on identifying and assessing the risk factors associated with administering spinal anesthesia, the review analyzes published literature and clinical investigations carried out in the field of anesthesia. Various key factors, including technique-related procedural and patient-related aspects, can influence the effectiveness of spinal anesthesia. Among these factors are age, sex, body mass index, concurrent conditions (such as cardiovascular disease, diabetes, and respiratory problems), pre-existing neurological issues, allergies, and a history of adverse responses to anesthesia drugs. Additionally, the chance of problems might be increased by physical abnormalities or malformations in the spinal canal and vertebral column. The safety and effectiveness of spinal anesthesia depend significantly on procedural factors, such as the type and dosage of anesthesia agents administered and the patient's position and alignment maintained during the entire surgical procedure and the injection rate. Increased risks can also be caused by inadequate monitoring and a slow response to unfavorable circumstances. Risk factors related to the technique include the expertise and competency of the anesthesiologist or medical professional carrying out the procedure. Inadequate post-procedure monitoring, inadvertent dural puncture, and improper needle placement might lead to complications during or after the spinal anesthesia administration. This review emphasizes the need for a complete preoperative assessment, suitable patient selection, and rigorous procedural planning to reduce the likelihood of problems during the administration of spinal anesthesia. It also emphasizes the significance of ongoing monitoring and timely management of adverse events to guarantee patient safety and the best results. Healthcare professionals may put preventative measures in place and follow best practices to limit possible consequences efficiently by recognizing the risk factors associated with spinal anesthesia. This review helps encourage safer anesthesia practices and improve patient care as medical knowledge and technology advance. However, further study and evidence-based recommendations are required to enhance patient outcomes and risk assessment.

Role of cosyntropin in the management of postpartum post-dural puncture headache: a two-center retrospective cohort study

BACKGROUND

Research suggests that postpartum post-dural puncture headache (PDPH) might be prevented or treated by administering intravenous cosyntropin.

METHODS

In this retrospective cohort study, we questioned whether prophylactic (1 mg) and therapeutic (7 µg/kg) intravenous cosyntropin following unintentional dural puncture (UDP) was effective in decreasing the incidence of PDPH and therapeutic epidural blood patch (EBP) after birth. Two tertiary-care American university hospitals collected data from November 1999 to May 2017. Two hundred and fifty-three postpartum patients who experienced an UDP were analyzed. In one institution 32 patients were exposed to and 32 patients were not given prophylactic cosyntropin; in the other institution, once PDPH developed, 36 patients were given and 153 patients were not given therapeutic cosyntropin. The primary outcome for the prophylactic cosyntropin analysis was the incidence of PDPH and for the therapeutic cosyntropin analysis in exposed vs. unexposed patients, the receipt of an EBP. The secondary outcome for the prophylactic cosyntropin groups was the receipt of an EBP.

RESULTS

In the prophylactic cosyntropin analysis no significant difference was found in the risk of PDPH between those exposed to cosyntropin (19/32, 59%) and unexposed patients (17/32, 53%; odds ratio (OR) 1.37, 95% CI 0.48 to 3.98, P = 0.56), or in the incidence of EBP between exposed (12/32, 38%) and unexposed patients (6/32, 19%; OR 2.6, 95% CI 0.83 to 8.13, P = 0.095). In the therapeutic cosyntropin analysis, in patients exposed to cosyntropin the incidence of EBP was significantly higher (20/36, 56% vs. 43/153, 28%; OR 3.20, 95% CI 1.52 to 6.74, P = 0.002).

CONCLUSIONS

Our data show no benefits from the use of cosyntropin for preventing or treating postpartum PDPH.

Neostigmine and atropine as a treatment for postdural puncture headache after spinal anesthesia in cesarean section: A case report

Key Clinical message

Neostigmine and atropine offer a promising treatment option for postdural puncture headache (PDPH) following spinal anesthesia in cesarean section, providing effective relief with a favorable risk-benefit profile.

Abstract

Postdural puncture headache (PDPH) is a common consequence of cesarean section surgeries after spinal anesthesia. This case study describes the successful treatment of PDPH with intravenous neostigmine and atropine. A 31 years female who underwent elective cesarean section with spinal anesthesia developed a severe headache on the 6th postoperative day and was diagnosed to have PDPH. PDPH failed to respond to conventional treatment modalities like hydration, a Non-steroidal anti-inflammatory drug, and sphenopalatine ganglion block. Epidural blood patch could not be performed due to lack of consent. A trial dose of intravenous neostigmine (20 mcg/kg) along with atropine (10 mcg/kg) successfully provided symptomatic and clinical relief. The combination of neostigmine and atropine demonstrates a rapid onset of action, providing patients with effective analgesia while avoiding the need for invasive procedures such as epidural blood patches and offers quicker pain relief. This promising result warrants additional research.

Spinal anesthesia for L5-S1 interlaminar endoscopic lumbar discectomy: a retrospective study

OBJECTIVE

This study aimed to report our experience with spinal anesthesia (SA) in patients undergoing L5-S1 interlaminar endoscopic lumbar discectomy (IELD) and clarify its advantages and disadvantages.

METHODS

One hundred twelve patients who underwent IELD for an L5-S1 disc herniation under SA were retrospectively analyzed. SA with 0.5% ropivacaine was administered using a 27-gauge fine needle. Intraoperatively, the volume and level of SA, surgical time, blood loss, and cardiopulmonary complications were documented. Postoperative data was collected included the number of patients who ambulated on the day of surgery, incidence of complications and were then statistically analyzed.

RESULTS

Analgesia was complete throughout the entire operation in all patients and no other adjuvant intraoperative analgesic drugs were needed. Mean visual analog scale scores for intraoperative and early postoperative (24 h) pain were 0 and 2.43 ± 1.66. SA was administered at the L3-4 interspace in 34 patients (30.4%) and the L2-3 interspace in 78 (69.6%). Administration was successful with the first attempt in all patients. Mean operation time was 70.12 ± 6.52 min. Mean intraoperative blood loss volume was 20.71 ± 5.26 ml. Ninety-eight patients ambulated on the same day as surgery. Mean length of hospital stay was 24.36 ± 3.64 h. Dural injury without damaging the nerve root occurred in one patient. One patient experienced recurrent disc herniation. Intraoperative hypotension and respiratory distress occurred in five (4.5%) and three (2.7%) patients, respectively. Three patients (2.7%) received postoperative analgesia therapy and two (1.8%) experienced nausea. Two patients (1.8%) developed urinary retention. Spinal headache, cauda equina syndrome, and neurotoxicity did not occur.

CONCLUSION

SA can achieve satisfactory pain control for patients undergoing IELD with a low incidence of adverse events. SA may be a useful alternative to local and general anesthesia for IELD surgery. Future randomized controlled trials are warranted to investigate.

Reversible cerebral vasoconstriction syndrome following intracranial hypotension in a postpartum patient: a case report and literature review

Introduction

Reversible cerebral vasoconstriction syndrome (RCVS) is a potentially life-threatening neurological disorder, rarely linked to intracranial hypotension. The presentation showed a patient with intracranial hypotension after peridural anesthesia who experienced RCVS during the early postpartum period, suggesting a potential involvement of intracranial hypotension in RCVS occurrence.

Case report

A young female of 29 years of age initially developed an orthostatic headache after undergoing a painless delivery with lumbar epidural anesthesia. Intracranial hypotension was considered the underlying cause. Her headache was partially resolved after intravenous fluid therapy and strict bed rest. After 2 days, the patient had a new onset thunderclap headache with generalized seizures, cortical blindness, and elevated blood pressure. An MRI scan revealed high signal intensity within the temporal, parietal, and occipital lobes, left caudate nucleus, and right cerebellum on T2-FLAIR imaging with vasogenic edema. MR angiography indicated multifocal, segmental, diffuse narrowing affecting the cerebral arteries that are large and medium. An RCVS2 score was six, and the patient was diagnosed with RCVS. She was managed conservatively, quickly improving her symptoms. After 10 days, a follow-up MRI indicated a significant reduction in the abnormal signal, and a substantial resolution of the constriction of the cerebral artery constriction was confirmed by MR angiography.

Conclusion

Intracranial hypotension could potentially lead to RCVS in postpartum patients, and it may be triggered by cerebral vasospasm secondary to intracranial hypotension.

Etiology, management, and sequela of postdural puncture headache

PURPOSE

The purpose of this article is to provide readers with a concise overview of the cause, incidence, treatment of, and sequalae of postdural puncture headaches (PDPH). Over the past 2 years, much data has been published on modifiable risk factors for PDPH, treatments for PDPH, and sequalae of PDPH particularly long-term.

RECENT FINDINGS

There is emerging data about how modifiable risk factors for PDPH are not as absolute as once believed. There have been several new meta-analysis and clinical trials published, providing more data about effective therapies for PDPH. Significantly, much recent data has come out about the sequalae, particularly long-term of dural puncture.

SUMMARY

Emerging evidence demonstrates that in patients who are at low risk of PDPH, needle type and gauge may be of no consequence in a patient developing a PDPH. Although epidural blood patch (EBP) remains the gold-standard of therapy, several other interventions, both medical and procedural, show promise and may obviate the need for EBP in patients with mild-moderate PDPH. Patients who endure dural puncture, especially accidental dural puncture (ADP) are at low but significant risk of developing short term issues as well as chronic pain symptoms.

Acute headache in pregnant and post-partum patients: A clinical review

BACKGROUND

Headaches during pregnancy and the post-partum period may be due to either an exacerbation of a pre-existing neurological presentation, a new pregnancy-related process, or a non-pregnancy related condition. Key physiologic changes during pregnancy and the post-partum period contribute to the vulnerability of this patient population and the increased risk of complications.

OBJECTIVE OF THE REVIEW

Review causes of headaches in pregnant and post-partum patients as well as neuroimaging techniques performed.

DISCUSSION

Headaches are a common complaint for pregnant and post-partum patients. For pregnant patients, a range of serious causes must be considered including cerebral venous thrombosis, posterior reversible encephalopathy syndrome and stroke. Primary headaches are responsible for most post-partum headaches, however other causes also include pre-clampsia, cerebral venous thrombosis and post-dural headache. Determining the optimal imaging technique in this vulnerable population remains a challenge given the scarce guidelines.

CONCLUSION

The greatest difficulty while evaluating pregnant and post-partum patients presenting with an acute headache in an emergency setting is to determine whether the headache is due to a primary disorder such as migraines or is secondary to an underlying, sometimes serious pathology. The following review explores evidenced-based diagnosis of headache in this particular setting.

Postpartum complications following neuraxial anaesthesia for obstetric physicians

Neuraxial analgesia and anaesthesia are widely accepted and well-tolerated modes of delivery analgesia, being employed in up to 76% of vaginal deliveries and 94% of caesarean deliveries in the United States.1 A cause of considerable concern for postpartum women, their family and caring health professionals is the occurrence of unexplained postpartum complications, not only for management in the index pregnancy, but the uncertain risk of recurrence in future pregnancies. Complications of neuraxial blocks may impact significantly on the ability of mothers to care for and bond with their newborn. The reported incidence of temporary neurological deficit following obstetric neuraxial blocks is 1 in 3900 procedures, and the risk of permanent neurological harm estimated to be between 1 in 80,000 and 1 in 320,425 procedures.2 Obstetric physicians may be asked to review women with postpartum complications following neuraxial blocks. This article reviews complications that may be seen following neuraxial blocks for delivery.

Evidence-based clinical practice guidelines on postdural puncture headache: a consensus report from a multisociety international working group

INTRODUCTION

Postdural puncture headache (PDPH) can follow unintentional dural puncture during epidural techniques or intentional dural puncture during neuraxial procedures such as a lumbar puncture or spinal anesthesia. Evidence-based guidance on the prevention, diagnosis or management of this condition is, however, currently lacking. This multisociety guidance aims to fill this void and provide practitioners with comprehensive information and patient-centric recommendations to prevent, diagnose and manage patients with PDPH.

METHODS

Based on input from committee members and stakeholders, the committee cochairs developed 10 review questions deemed important for the prevention, diagnosis and management of PDPH. A literature search for each question was performed in MEDLINE (Ovid) on 2 March 2022. The results from each search were imported into separate Covidence projects for deduplication and screening, followed by data extraction. Additional relevant clinical trials, systematic reviews and research studies published through March 2022 were also considered for the development of guidelines and shared with contributors. Each group submitted a structured narrative review along with recommendations graded according to the US Preventative Services Task Force grading of evidence. The interim draft was shared electronically, with each collaborator requested to vote anonymously on each recommendation using two rounds of a modified Delphi approach.

RESULTS

Based on contemporary evidence and consensus, the multidisciplinary panel generated 50 recommendations to provide guidance regarding risk factors, prevention, diagnosis and management of PDPH, along with their strength and certainty of evidence. After two rounds of voting, we achieved a high level of consensus for all statements and recommendations. Several recommendations had moderate-to-low certainty of evidence.

CONCLUSIONS

These clinical practice guidelines for PDPH provide a framework to improve identification, evaluation and delivery of evidence-based care by physicians performing neuraxial procedures to improve the quality of care and align with patients' interests. Uncertainty remains regarding best practice for the majority of management approaches for PDPH due to the paucity of evidence. Additionally, opportunities for future research are identified.

Caffeine for Headaches: Helpful or Harmful? A Brief Review of the Literature

Consumption of caffeine in the diet, both daily and occasional, has a significant biological effect on the nervous system. Caffeine, through various and not yet fully investigated mechanisms, affects headaches. This is especially noticeable in migraine. In other headaches such as hypnic headache, post-dural puncture headache and spontaneous intracranial hypotension, caffeine is an important therapeutic agent. In turn, abrupt discontinuation of chronically used caffeine can cause caffeine-withdrawal headache. Caffeine can both relieve and trigger headaches.

Isolated Abducens Nerve Palsy Following Spinal Anesthesia

A healthy 28-year-old lady, para 1, presented to the emergency department with persistent frontal headache, nausea, and vomiting following an emergency cesarean section four days ago. She experienced difficulties with six failed attempts of spinal anesthesia intrapartum before conversion to general anesthesia. A 25-gauge Whitacre needle was utilized for administering spinal anesthesia under a sitting position. The anesthetist noticed a loss of resistance upon needle insertion, but only a negligible amount of cerebrospinal fluid was obtained upon removing the stylet. The patient underwent an emergency cesarean section due to fetal distress, and she was not in labor during the attempts of spinal anesthesia. Otherwise, the cesarean section lasted for an hour and was uneventful. No intrapartum eclampsia or pre-eclampsia. She was diagnosed with post-dural puncture headache, and her symptoms improved after receiving intravenous hydration, oral caffeine, and non-steroidal anti-inflammatory drug (NSAIDs). However, on the sixth day after the spinal anesthesia, she suddenly developed double vision. Examination showed bilateral visual acuity was measured at 6/7.5. No proptosis or ptosis was noted. The relative afferent pupillary defect was negative with no anisocoria. Both eyes were orthophoria with normal head posture. Extraocular muscles revealed a right abduction restriction of -1 with the patient complaining of binocular horizontal diplopia at the right gaze, consistent with right abducens nerve palsy. Systemic neurological findings were normal, and imaging results were unremarkable. Diagnosis of right abducens nerve palsy post-dural puncture was made clinically. The patient was keen on conservative management instead of blood patch therapy. Hence, she was treated supportively via uni-ocular patching to relieve diplopia. Spontaneous complete recovery of the right abducens nerve palsy was observed after three weeks. Cranial nerve palsy is a rare complication reported following spinal anesthesia, with the abducens nerve being the commonest nerve involved. Although it is not always benign, the presented case showed spontaneous complete recovery of the right abducens nerve palsy after three weeks. Awareness of this uncommon complication will avoid unnecessary distress and investigative burden to both the patient and the doctor.

Post-dural puncture headache accompanied by obvious nasal congestion: A case report

INTRODUCTION

Post-dural puncture headache (PDPH) is the most common complication of intraspinal nerve block in gravida. PDPH may be accompanied by neck stiffness, tinnitus, hearing loss, photophobia or nausea.

PATIENT CONCERNS

A 33-year-old woman whose dura was accidentally punctured during labor analgesia complained of severe headache, dizziness, and nasal congestion; these symptoms aggravated when she looked up, and her sense of smell was normal 8 hours after catheter removal.

DIAGNOSES

Based on the patient's complaints and clinical appearance, diagnosis of PDPH was considered.

INTERVENTIONS

Nasal congestion disappeared with headache and dizziness after epidural injections of saline. The puerpera received saline injections 4 times; after treatment, she was discharged from the hospital when the symptoms did not limit her daily movement.

OUTCOMES

The symptoms disappeared completely on the seventh day of telephone follow-up visit. The mechanism of her nasal obstruction is not very clear.

CONCLUSION

We believe it is caused by the pulling of the intracranial nerve as the brain tissue sinks and shifts due to the decrease in intracranial pressure.

Awareness of Postdural Puncture Headache Among Specialists who Perform Lumbar Punctures and/or Monitor Patients Following the Procedure

Objective

Lumbar puncture (LP) is performed by specialists in different branches of medicine, complications may be encountered in various settings. In our study, we evaluated the awareness and knowledge of the diagnosis and treatment of post-dural puncture headache (PDPH) among specialists who performed LP and/or encountered complications.

Methods

This was a prospective questionnaire/scale study of 253 physicians: LP performers (anaesthesiologists, Group A; others, Group B) and those who worked in departments that did not perform LP but frequently encountered complications following LP (Group C). The questionnaire assessed specialization, frequency of LPs utilization, needle types used, positions employed, awareness of LP complications, diagnosis, management, and risk factors for PDPH.

Results

Group A had the highest percentage of physicians who stated they had knowledge about PDPH (Group A: 96.4%, Group B: 77.3%, Group C: 39.4%; P=0.000). Group C was found to be statistically less informed than the other two groups (P=0.000). It was determined that only one (1%) physician from Group C correctly answered the question about the diagnostic criteria for PDPH.

Conclusion

To our knowledge this is the first study in which the awareness of PDPH has been compared according to physicians' fields of specialisation. We believe that post-specialty training programs should be organized for physicians who will either perform LP or monitor patients who have undergone LP, and the curriculum content in relevant specialties should be reviewed.

Post Dural Puncture Subdural Hematoma: A Rare Iatrogenic Complication of Neuraxial Anesthesia

Although post-dural puncture headache is a well-known complication of neuraxial anesthesia, subdural hematoma following epidural injection is a rare but potentially under-recognized complication. The following is the case of a young female patient with no significant past medical history who developed a persistent and severe headache following the introduction of epidural anesthesia for labor induction. Imaging demonstrated multiple small subdural hematomas with findings concerning intracranial hypotension. She eventually underwent a blood patch and reported immediate relief from her headache.

The initial experience of 4.5/6.5 Fr ureteroscopic laser lithotripsy under topical intraurethral anesthesia supplemented by preoperative and intraoperative medications

PURPOSE

To assess the safety and effectiveness of the 4.5/6.5 Fr ureteroscopic laser lithotripsy (URSL) under topical intraurethral anesthesia (TIUA) compared to spinal anesthesia (SA).

METHODS

A retrospective study was conducted on 47 (TIUA: SA = 23:24) patients receiving 4.5/6.5 Fr URSL from July 2022 to September 2022. For the TIUA group, atropine, pethidine, and phloroglucinol were used apart from lidocaine. In the SA group, patients received lidocaine and bupivacaine. We compare the two groups including stone-free rate (SFR), procedure time, anesthesia time, overall operative time, hospital stay, anesthesia failure, intraoperative pain, need for additional analgesia, cost, and complications.

RESULTS

The conversion rate in the TIUA group was 4.35% (1/23). SFR was 100% in both groups. Surgical waiting time and anesthesia time were longer in the SA group (P < 0.001). There were no statistical differences in operational time and intraoperative pain. Patients developed grade 0-1 ureteral injuries. Post-surgical time out of bed was noticeably faster in the TIUA group (P < 0.001). The post-operative complication rate including vomiting and back pain was lower in the TIUA group (P = 0.005).

CONCLUSION

TIUA had an equal surgical success rate and controlled patients' intraoperative pain as SA. It was superior in terms of TIUA's patient admission, waiting time for surgery, anesthesia time, post-operative time out of bed, low complications, and costs, especially for females.

Evaluation of an automatic approach device to the epidural space of Beagle dogs

OBJECTIVE

To compare the epidural anesthesia device (EPIA), which facilitates an automatic approach to location of the epidural space, with the performance of clinicians using tactile sensation and differences in pressure when inserting an epidural needle into the epidural space of a dog.

STUDY DESIGN

Prospective, crossover experiment.

ANIMALS

A total of 14 Beagle dogs weighing 7.5 ± 2.4 kg (mean ± standard deviation).

METHODS

Each dog was anesthetized three times at 2 week intervals for three anesthesiologists (two experienced, one novice) to perform 14 epidural injections (seven manual and EPIA device each). The sequence of methods was assigned randomly for each anesthesiologist. The dogs were anesthetized with medetomidine (10 μg kg^-1), alfaxalone (2 mg kg^-1) and isoflurane and positioned in sternal recumbency with the pelvic limbs extended cranially. Epidural puncture in the manual method was determined by pop sensation, hanging drop technique and reduced injection pressure, whereas using the device a sudden decrease in reaction force on the device was detected. A C-arm identified needle placement in the epidural space, and after administration of iohexol (0.3 mL), the needle length in the epidural space was defined as the mean value measured by three radiologists. Normality was tested using the Kolmogorov-Smirnov test, and significant differences between the two methods were analyzed using an independent sample t test.

RESULTS

In both methods, the success rates of epidural insertion were the same at 95.2%. The length of the needle in the epidural space using the device and manual methods was 1.59 ± 0.50 and 1.68 ± 0.88 mm, respectively, with no significant difference (p = 0.718).

CONCLUSIONS AND CLINICAL RELEVANCE

EPIA device was comparable to human tactile sense for an epidural needle insertion in Beagle dogs. Further research should be conducted for application of the device in clinical environments.

Paravertebral Cerebrospinal Fluid Exudation in Young Women with Postdural Puncture Headache: A Hypothetical Interpretation based on Anatomical Study on Intervertebral Foramen

Background Postdural puncture headache (PDPH) is defined as a prolonged orthostatic headache secondary to a lumbar puncture. The mechanism underlying this unpleasant complication and the reasons explaining its higher incidence in the young are not well understood. Here, we speculate on the mechanisms underlying PDPH based on spinal magnetic resonance imaging (MRI) in patients with PDPH and an anatomical study on the size of the intervertebral foramen.

Methods Brain and spinal MRI findings were examined in two young women with PDPH. The relationship between age and size of the intervertebral foramen on computed tomography was assessed in 25 female volunteers (22–89 years old) without spinal disease.

Results The causative interventions leading to PDPH were epidural anesthesia for painless delivery in a 28-year-old woman and lumbar puncture for examination of the cerebrospinal fluid (CSF) in a 17-year-old woman. These two patients developed severe orthostatic hypotension following the procedure. Brain MRI showed signs of intracranial hypotension, including subdural effusion, in one patient, but no abnormality in the other. Spinal MRI revealed an anterior shift of the spinal cord at the thoracic level and CSF exudation into the paravertebral space at the lumbar level. Treatment involving an epidural blood patch in one patient and strict bed rest with sufficient hydration in the second led to improvement of symptoms and reduction of paravertebral CSF exudation. The size of the intervertebral foramen at the L2–3 level in the 25 volunteers showed a decrease in an age-dependent manner (Spearman's rho −0.8751, p < 0.001).

Conclusion We suggest that CSF exudation from the epidural space of the vertebral canal to the paravertebral space through the intervertebral foramen, which is generally larger in the younger population, is the causative mechanism of PDPH.

Do Spinal Needle Sizes Affect the Development of Traumatic CSF in Neonatal LP Procedures?

Lumbar puncture (LP) is widely employed to evaluate infectious, neurological and metabolic diseases in the newborn. Neonatal LP is a difficult procedure with 45–54% success rates. Although there are studies examining traumatic LP failure, studies on the effects of needle sizes are limited. This study was intended to investigate the effect of needle sizes on LP traumatization. Term and premature babies who underwent LP in the neonatal intensive care unit between 30 November 2017 and 30 July 2019 were included in the study by retrospective file scanning. LP was performed by a pediatric or neonatal specialist using a 22 Gauge pen (G) or 25 G pen spinal needle in all cases, with all patients being placed in the lateral decubitus position. The primary outcome was to evaluate the effect of needle sizes used in LP on traumatization. The secondary outcome was to evaluate traumatization rates and complications. A statistically significant difference was determined in the rate of traumatized LP and desaturation development between needle sizes and CSF microscopic findings (p = 0.031, p = 0.005, and p = 0.006, respectively). The study data show that 25 G pen-tip spinal needles cause less traumatic LP in neonates than 22 G pen-tip spinal needles.

An unexpected effect of traumatic and bloody lumbar puncture among patients with primary headaches in emergency department

BACKGROUND

This study aimed to investigate the association between traumatic tap and the incidence of post-dural puncture headache (PDPH) following lumbar puncture (LP) among patients who underwent LP with a primary discharge diagnosis of primary headache in the emergency department (ED).

METHODS

We retrospectively reviewed the medical records of patients who visited a single tertiary ED with the symptom of a headache and underwent LP for cerebrospinal fluid (CSF) analysis between January 2012 and January 2022. Patients who met the definition of PDPH and revisited the ED or outpatient clinic within 2 weeks of discharge were included. For comparative analysis, we divided the groups according to CSF RBC counts (group 1, CSF RBC <10 cells/μL; group 2, 10-100 cells/μL; group 3, ≥100 cells/μL). The primary outcome was the difference in CSF RBC counts between the ED or outpatient clinic revisiting patients who underwent LP within 2 weeks after discharge from the ED. The secondary outcomes were the admission rate and risk factors for PDPH; sex, age, needle size, and CSF pressure.

RESULTS

Data from 112 patients were collected; PDPH was reported in 39 patients (34.8%), and 40 (35.7%) patients were admitted. The median (interquartile range) CSF RBC count was 10 [2-100.8] cells/μL. One-way analysis of variance test of the mean differences among the three groups showed no differences in age, the duration of headache before LP, PLT counts, PT, or aPTT among the groups. There were differences in the number of admitted patients (30 vs. 7 vs. 3, P < 0.001) and the incidence of PDPH (29 vs. 6 vs. 4, P < 0.003). In the comparison of the PDPH and non-PDPH groups, there were differences in age (28.7 ± 8.4 years vs. 36.9 ± 18.4 years, P = 0.01) and the admission rate (85% vs. 9%, P < 0.001).

CONCLUSIONS

Notably, our results suggest that traumatic LP may be an unexpected factor in reducing the occurrence rate of PDPH. Consequently, the admission rate for PDPH was significantly reduced among patients with traumatic LP and those with primary headaches. In this study, we collected and analyzed the data from a relatively small sample size of 112 patients. Further studies are needed to evaluate the relationship between traumatic LP and PDPH.

Acute Intracranial Subdural Hematoma Masquerading as a Postpartum Headache: A Case Report

INTRODUCTION

An acute subdural hematoma is a collection of blood in the space between the dural and arachnoid membranes overlying the brain. Head trauma is the most common cause. Less frequently, low cerebrospinal fluid pressure, due to a spontaneous or iatrogenic cerebrospinal fluid leak can result in a subdural hematoma.

CASE REPORT

We discuss the case of a 26-year-old woman who presented with a frontal headache following epidural anesthesia for vaginal delivery. The differential diagnosis included spinal headache, postpartum hypercoagulability, dural sinus thrombosis, and intracranial hemorrhage or mass. Her vital signs and physical examination were normal. A computed tomography of the brain revealed an acute subdural hematoma along the left frontal cerebral hemisphere, without midline shift or mass effect. A blood patch was placed with complete resolution of her symptoms.

CONCLUSION

This case illustrates an unusual case of an acute subdural hematoma in the postpartum period following epidural anesthesia for labor pain management. It was thought to be caused by intracranial hypotension following epidural anesthesia and a cerebrospinal fluid leak.

Epidural hydroxyethyl starch ameliorating postdural puncture headache after accidental dural puncture

BACKGROUND

No convincing modalities have been shown to completely prevent postdural puncture headache (PDPH) after accidental dural puncture (ADP) during obstetric epidural procedures. We aimed to evaluate the role of epidural administration of hydroxyethyl starch (HES) in preventing PDPH following ADP, regarding the prophylactic efficacy and side effects.

METHODS

Between January 2019 and February 2021, patients with a recognized ADP during epidural procedures for labor or cesarean delivery were retrospectively reviewed to evaluate the prophylactic strategies for the development of PDPH at a single tertiary hospital. The development of PDPH, severity and duration of headache, adverse events associated with prophylactic strategies, and hospital length of stay postpartum were reported.

RESULTS

A total of 105 patients experiencing ADP received a re-sited epidural catheter. For PDPH prophylaxis, 46 patients solely received epidural analgesia, 25 patients were administered epidural HES on epidural analgesia, and 34 patients received two doses of epidural HES on and after epidural analgesia, respectively. A significant difference was observed in the incidence of PDPH across the groups (epidural analgesia alone, 31 [67.4%]; HES-Epidural analgesia, ten [40.0%]; HES-Epidural analgesia-HES, five [14.7%]; P <0.001). No neurologic deficits, including paresthesias and motor deficits related to prophylactic strategies, were reported from at least 2 months to up to more than 2 years after delivery. An overall backache rate related to HES administration was 10%. The multivariable regression analysis revealed that the HES-Epidural analgesia-HES strategy was significantly associated with reduced risk of PDPH following ADP (OR = 0.030, 95% confidence interval: 0.006-0.143; P < 0.001).

CONCLUSIONS

The incorporated prophylactic strategy was associated with a great decrease in the risk of PDPH following obstetric ADP. This strategy consisted of re-siting an epidural catheter with continuous epidural analgesia and two doses of epidural HES, respectively, on and after epidural analgesia. The efficacy and safety profiles of this strategy have to be investigated further.

Management and outcomes of persistent headache after accidental dural puncture in the obstetric population: A 9-year prospective audit

OBJECTIVE

To assess the effectiveness and safety of a novel management pathway in the obstetric population presenting to a pain medicine clinic with persistent headache after accidental dural puncture (PHADP).

BACKGROUND

Accidental dural puncture (ADP) can result in headaches that persist for months to years. These headaches can be a therapeutic challenge, often cause severe disability, and management pathway remains obscure.

METHODS

Obstetric patients with PHADP referred to a pain medicine physician were prospectively followed up in a longitudinal audit of a novel management pathway. ADP reports dated from 2008 until 2019. Initial management included brain imaging and pharmacological agents. Patients who failed to respond were offered greater occipital nerve (GON) block with depot methylprednisolone followed by pulsed radiofrequency (PRF) treatment. A headache diary was completed for 4 weeks prior to commencing treatment and maintained for 24 weeks following an intervention. Data collected included use of epidural blood patch to manage postdural puncture headache, past history of headache, severity of headache, duration of persistent headache, low back pain, and employment status.

RESULTS

Over the 9-year period, a cohort of 54 obstetric patients with PHADP with a 16-gauge Tuohy needle were reviewed in the pain clinic. Forty patients presented with chronic daily headache (40/54, 74%). Brain imaging did not reveal any sign of intracranial hypotension in 50 patients (50/54, 93%). Mean follow-up period was 5.7 years. Two patients were lost to follow-up (2/54, 4%). Pharmacological management was effective in 17 patients (17/52, 33%). Medical management failed to improve symptoms in 35 patients (35/52, 67%), and they were offered GON block. Fourteen (14/35, 40%) patients refused the intervention. Nerve block was performed in 21 patients and produced durable benefit lasting 24 weeks in 18 patients (18/21, 86%). Three patients underwent PRF treatment to GONs and all three (100%) reported durable benefit. At final follow-up, mean monthly headache frequency was 5.9 for the medical management group, 8.6 for the refused nerve block group, and 4.1 in patients who received GON treatment (p < 0.001).

CONCLUSION

ADP can cause chronic headaches that persist beyond 3 years. Interventions targeting the GONs appear to have a role in the management of PHADP.

Treatment of dural tear with nerve root herniation after unilateral biportal endoscopic decompression using an epidural blood patch: a case report

We present a case of a dural tear associated with nerve root herniation following unilateral biportal endoscopic decompression (UBED) that was successfully treated using a computed tomography-guided epidural blood patch. A 60-year-old man underwent UBED for radicular pain because of spinal stenosis at L4-5. A left partial hemilaminectomy and flavectomy were performed; however, the left dorsolateral side dura mater was torn during the procedure. TachoComb® was applied at the dural tear site, and the pain was relieved following UBED. However, 3 weeks post-UBED, the patient reported severe pain with an electric shock-like sensation in the left buttock and posterior thigh region with no other neurologic symptoms. The pain was aggravated by standing and spinal motion. Follow-up lumbar spinal magnetic resonance imaging was performed. Axial images indicated protrusion of the left S2 nerve root through the left dorsolateral side of the dura mater. The patient was further diagnosed with nerve root herniation following a dura mater tear. A computed tomography-guided epidural blood patch was performed, with successful therapeutic results. The outcome of this study indicates that a small dural tear that occurs during minimally invasive spinal surgery can be efficiently treated using an epidural blood patch prior to open surgery.

Multiple lumbar punctures aiming to relieve headache results in iatrogenic spinal hematoma: a case report

BACKGROUND

Multiple lumbar punctures have historically been a strategy to relieve headaches associated with idiopathic intracranial hypertension despite limited clinical evidence of long-term efficacy. Lumbar puncture is typically a straightforward procedure with minimal complications reported, however, serious complications can occur. Lumbar-puncture-related spinal hematomas are rare but can lead to irreversible paralysis.

CASE PRESENTATION

We report a case of a 28-year-old Caucasian woman who was treated with multiple lumbar punctures to manage headache, thought to be attributed to idiopathic intracranial hypertension. The patient developed a lumbosacral epidural hematoma following a lumbar puncture, which led to incomplete cauda equina syndrome. Multiple lumbar punctures had been the long-term management for the patient's chronic headaches associated with her diagnosis of idiopathic intracranial hypertension. She had no risks of an underlying coagulopathy. Following a lumbar puncture, she re-presented with lower back pain and bilateral paresthesia. Over the subsequent 48 hours, this progressed to urinary incontinence and saddle paresthesia. Imaging revealed an epidural hematoma, which was conservatively managed. She continued to report saddle paresthesia and urinary incontinence 7 months following the lumbar puncture. Between 1974 to 2022, our literature search found 41 case reports detailing lumbar-puncture-related spinal hematomas. It is an established but rare complication of lumbar puncture and there are limited studies looking at the incidence of its occurrence. Whilst coagulopathy has been found to be a risk factor, it is unclear if the gauge of the needle is relevant. Case evidence suggests there may be no significant difference in outcomes between surgical and conservative management of spinal hematomas. This case highlights that lumbar punctures can be invasive, with potentially serious complications. A lumbar puncture should therefore only be performed when clinically justified.

CONCLUSIONS

This case highlights a rare complication of lumbar puncture and emphasizes the importance of a risk-benefit discussion for each procedure. Spinal hematoma following lumbar puncture is a rare complication but with potentially devastating consequences. Within the setting of idiopathic intracranial hypertension, the evidence base for the long-term benefit of headache relief by repeat lumbar puncture is low.

Complications of injections in conservative treatment of degenerative spine disease: a prospective unicentric study

BACKGROUND

Spinal injection has been an accepted part of conservative therapy for degenerative diseases. The drugs used can cause side effects and severe complications. The aim of this study was to determine the occurrence of general side effects (GSE) and complications when performing consecutive different types of spinal injections and to evaluate pain reduction.

METHODS

Prospective data evaluation of patients with degenerative spine disease at hospital admission, discharge, and six and 12 weeks after discharge. All patients received a specific injection protocol depending on their symptoms and radiological findings. The injections performed were dorsal sacroiliac joint injections, perineural injections, epidural interlaminar and epidural periradicular injections, and facet joint injections. Potential complications were categorized and recorded as GSE and complications. In addition, the Numerical Analog Scale (NAS) for pain, the Oswestry Disability Index (ODI) were evaluated.

RESULTS

Forty-eight patients were enrolled. There were 282 spinal injections performed. A total of 131 common treatment-related events were recorded. Depending on the type of injection, transient pain at the injection site (32.4-73.5%), radiating pain (9.4-34.7%), and nerve root irritation (2-18.4%) were the most common. One complication with postpuncture syndrome occurred with epidural-interlaminar injection. No persistent neurologic deficits occurred. The highest rate of GSE was observed with periradicular injections (relative frequency (RF) = 0.8), followed by epidural-interlaminar injections (RF = 0.65), least frequently with FJ injections (RF = 0.32). From the time of admission to discharge, NAS scores were significantly decreased and ODI score significantly improved at discharge (p < 0.001), but relapse occurred at the 12-week follow-up.

CONCLUSIONS

Various consecutive spinal injections for conservative treatment of degenerative spine diseases are safe and lead to a decrease in pain and improvement in quality of life. GSE are common, but not persistent. Although complications are rare, they can have serious consequences for the patient.

Lumbar puncture: considerations, procedure, and complications

Lumbar puncture is an important technique used to obtain cerebrospinal fluid, administer medications, and monitor intracerebral pressure. As essential invasive approach to diagnosing and treating central nervous system disorders, clinicians should be familiar with lumbar puncture. This review includes the considerations, contraindications, procedures, and complications of lumbar puncture.

[Postdural puncture headache in obstetrics : Pathogenesis, diagnostics and treatment]

Postdural puncture headache (PDPH) is one of the most important complications of peripartum neuraxial analgesia. Loss of cerebrospinal fluid volume and pressure as well as compensatory intracranial vasodilation are assumed to be responsible. Potentially severe long-term sequelae necessitate the correct diagnosis of PDPH, exclusion of relevant differential diagnoses (with atypical symptoms and when indicated via imaging techniques) and rapid initiation of effective treatment. Nonopioid analgesics, caffeine and occasionally theophylline, gabapentin and hydrocortisone are the cornerstones of pharmacological treatment, while the timely placement of an autologous epidural blood patch (EBP) represents the gold standard procedure when symptoms persist despite the use of analgesics. Procedures using neural treatment are promising alternatives, especially when an EBP is not desired by the patient or is contraindicated. Interdisciplinary and interprofessional consensus standard procedures can contribute to optimization of the clinical management of this relevant complication.

Post-dural puncture headache: a prospective study on incidence, risk factors, and clinical characterization of 285 consecutive procedures

Background

Lumbar puncture (LP) is a common and relatively safe neurological procedure. It can be complicated by post-dural puncture headache (PDPH) after both diagnostic and therapeutic procedures. The aim of this study is to identify the incidence, risk factors and clinical characterization of PDPH in the inpatient setting of the main tertiary neurology hospital in Kuwait.

Methods

We conducted a prospective observational cohort study that included patients who were admitted to neurology department at Ibn Sina hospital, Kuwait, from January 1, 2019 to December 31, 2020, on whom, LP was performed for diagnostic and/or therapeutic reasons. Multivariate logistic regression analysis was performed to evaluate the association between PDPH and different clinical parameters.

Results

A total of 285 patients were included; 225 females (78.9%), mean age of 32.9 ± 11.7 years. PDPH was reported by 84 patients (29.5%), with mean headache onset of 1.7 ± 0.8 days, and mean duration of 2.4 ± 2.1 days. The commonest headache type was dull aching in 49 patients (58.3%). Headache severity was mild to moderate in 64 patients (76.2%), with mean NRS of 4.1 ± 0.9. Most PDPH (99.3%) resolved with conservative medical management, with only 2 patients (0.7%) requiring epidural blood patch. In multivariate logistic regression model, there was a statistically significant correlation between development of PDPH and young age (p = 0.001), female gender (p = 0 .001), low BMI (p < 0 .001), pre-LP headache (p = 0.001), history of previous PDPH (p = 0.001), and number of LP attempts (p < 0.001). PDPH was statistically significantly higher in patients with optic neuritis (p = 0.009), and cerebral venous thrombosis (p = 0.007), and lower in patients with peripheral neuropathy (p = 0.011) and spinal muscular atrophy (p = 0.042).

Conclusions

Findings from clinical practice in the main tertiary neurology hospital in Kuwait were in line with literature findings. Younger age, female gender, lower BMI, pre-procedural headache, previous history of PDPH, and number of LP attempts were found to be independent risk factors for developing PDPH. To our knowledge, this study represents the first comprehensive description of PDPH in a population from the Arabian Gulf Region.

Epidural blood patch in the treatment of severe post dural puncture headache after spinal anesthesia: A rare case report

Introduction and importance

Spinal anesthesia is a type of regional anesthesia that involves injecting a local anesthetic directly into the cerebrospinal fluid. In Ethiopia, the prevalence of PDPH was 42.6%, with large spinal needles and repeated attempts being independently associated risk factors.

Case presentation

A 20-year-old woman is undergoing a cesarean section while under spinal anesthesia. On the second postoperative day, the patient begins to complain of PDPH-like headaches. The headache was severe according to the VAS score, and the team attempted to manage it using the WHO analgesic ladder, but it was refractory to supportive and pharmaceutical therapy. We then used EPDBP, and the headache was promptly reduced. The treatment had a considerable impact on the movement, satisfaction, and discharge conditions of the patients.

Clinical discussion

A prospective research conducted in Helsinki found that EBP was effective in 88–96% of the patients in the various study groups.

One randomized, double-blind trial on the therapeutic efficacy of EPDBP found that it is an effective treatment for PDPH. It provides complete symptom relief in a high number of people. In the remaining patients, it lessens the severity of their headaches and allows them to resume their normal activities.

An epidural blood patch is a highly successful treatment option for a subset of people suffering from post-Dural puncture headache. It is an elective procedure with a low risk of complications.

Conclusion

The epidural blood patch procedure that we use proved helpful in treating severe PDPH after spinal anesthesia for cesarean delivery. There were no complications associated with the procedure until she was discharged from the hospital.

•

PDPH is one of the commonest complications after spinal anesthesia.

•

Epidural Blood Patch is indicated for the management of moderate to severe PDPH.

•

The Epidural Blood Patch had an instant effect in reliving the PDPH.

•

There were no recorded complications related to the procedure.

Intravenous Adrenocorticotropic Hormone in the Treatment of Post-Dural Puncture Headache: A Case of Refractory to Multiple Epidural Patch

: Post-dural puncture headache (PDPH) is an iatrogenic complication. It can disturb daily activities and particularly breastfeeding after delivery. Epidural blood patch (EBP) is still a last resort and treatment of choice after administration of certain proposed drugs. The use of intravenous (IV) adrenocorticotropic hormone (ACTH) has been suggested for treatment even in refractory cases in a literature review. EBP is an invasive procedure and not desirable for most patients. The associated case report highlights the important role of ACTH in alleviating PDPH and its priority for administration prior to EBP. We hope this report prompts the anesthesiology community to provide a more evidence-based approach to the role of ACTH in the better management of PDPH.

Epidural anesthesia needle guidance by forward-view endoscopic optical coherence tomography and deep learning

Epidural anesthesia requires injection of anesthetic into the epidural space in the spine. Accurate placement of the epidural needle is a major challenge. To address this, we developed a forward-view endoscopic optical coherence tomography (OCT) system for real-time imaging of the tissue in front of the needle tip during the puncture. We tested this OCT system in porcine backbones and developed a set of deep learning models to automatically process the imaging data for needle localization. A series of binary classification models were developed to recognize the five layers of the backbone, including fat, interspinous ligament, ligamentum flavum, epidural space, and spinal cord. The classification models provided an average classification accuracy of 96.65%. During puncture, it is important to maintain a safe distance between the needle tip and the dura mater. Regression models were developed to estimate that distance based on the OCT imaging data. Based on the Inception architecture, our models achieved a mean absolute percentage error of 3.05% ± 0.55%. Overall, our results validated the technical feasibility of using this novel imaging strategy to automatically recognize different tissue structures and measure the distances ahead of the needle tip during the epidural needle placement.

Dural Puncture During Spinal Cord Stimulator Lead Insertion: Analysis of Practice Patterns

Background

Spinal cord stimulation (SCS) is an important modality for intractable pain not amenable to less conservative measures. During percutaneous SCS lead insertion, a critical step is safe access to the epidural space, which can be complicated by a dural puncture.

Objectives

In this review, we present and analyze the practices patterns in the event of a dural puncture during a SCS trial or implantation.

Methods

We conducted a survey of the practice patterns regarding spinal cord stimulation therapy. The survey was administered to members of the Spine Intervention Society and American Society of Regional Anesthesia specifically inquiring decision making in case of inadvertent dural puncture during spinal cord stimulator lead insertion.

Results

A maximum of 193 responded to a question regarding dural punctures while performing a SCS trial and 180 responded to a question regarding dural punctures while performing a SCS implantation. If performing a SCS trial and a dural puncture occurs, a majority of physicians chose to continue the procedure at a different level (56.99%), followed by abandoning the procedure (27.98%), continuing at the same level (10.36%), or choosing another option (4.66%). Similarly, if performing a permanent implantation and a dural puncture occurs, most physicians chose to continue the procedure at a different level (61.67%), followed by abandoning the procedure (21.67%), continuing at the same level (10.56%), or choosing another option (6.11%).

Conclusions

Whereas the goals of the procedure would support abandoning the trial but continuing with the permanent in case of inadvertent dural puncture, we found that decision choices were minimally influenced by whether the dural puncture occurred during the trial or the permanent implant. The majority chose to continue with the procedure at a different level while close to a quarter chose to abandon the procedure. This article sets a time stamp in practice patterns from March 20, 2020 to June 26, 2020. These results are based on contemporary SCS practices as demonstrated by this cohort, rendering the options of abandoning or continuing after dural puncture as reasonable methods. Though more data is needed to provide a consensus, providers can now see how others manage dural punctures during SCS procedures.

Prediction of Target Epidural Blood Patch Treatment Efficacy in Spontaneous Intracranial Hypotension Using Follow-Up MRI

Objectives: Epidural blood patching (EBP) is the mainstay therapy for spontaneous intracranial hypotension (SIH). MRI is used for evaluating spinal CSF leakage. Post-EBP MRI has been. shown to be effective in predicting the efficacy of EBP. However, there are few reports on how post-EBP MRI findings may change with time. The aim of this study was to evaluate the relationship between post-EBP MRI findings at different time points and the corresponding effectiveness of EBP. Methods: We retrospectively reviewed 63 SIH patients who had received target EBP. All patients received an MRI follow-up within 10 days (post-EBP MRI) and at 3 months after EBP (3-month MRI). A sub-group analysis was performed at different post-EBP MRI time points (0–2, 3–6, and 7–10 days). The relationships between the post-EBP MRI findings and the EBP effectiveness were evaluated. Results: Thirty-five (55.56%) patients were assigned to the EBP-effective group, and 28 (44.44%) were assigned to the EBP non-effective group according to the 3-month MRI. Compared to the EBP non-effective group, the EBP-effective group had significantly lower numbers of spinal CSF leakage in the post-EBP MRI (4.49 vs. 11.71; p = 0.000) and greater numbers of leakage improvement (7.66 vs. 2.96; p = 0.003). For patients who received post-EBP MRI during periods of 0–10, 0–2, 3–6, and 7–10 days, the cutoff values of numbers of spinal CSF leakage for predicting EBP failure were 4, 6, 4, and 5, respectively, with an AUC above 0.77. Conclusion: By using post-EBP MRI, which only takes approximately 20 min, predicting EBP efficacy became possible in SIH patients. This study provides cutoff values of numbers of spinal CSF leakage at different follow-up times to serve as clues of if further EBP is needed, which provides the novelty of the current study.

Safety and Usefulness of Lumbar Puncture for the Diagnosis and Management of Young-Onset Cognitive Disorders

BACKGROUND

Young-onset cognitive disorders (YOCD) often manifests with complex and atypical presentations due to underlying heterogenous pathologies. Therefore, a biomarker-based evaluation will allow for timely diagnosis and definitive management.

OBJECTIVE

Here, we evaluated the safety and usefulness of cerebrospinal fluid (CSF) sampling through lumbar puncture (LP) in YOCD patients in a tertiary clinical setting.

METHODS

Patients with mild cognitive impairment (MCI) and mild dementia with age of onset between 45-64 years were evaluated. Patients underwent magnetic resonance imaging and their medial temporal lobe atrophy (MTA) was rated. LP side-effects and the impact of the CSF findings on diagnosis and management were analyzed.

RESULTS

142 patients (53 (37.32%) MCI, 51 (35.92%) dementia of the Alzheimer's disease [DAT] type, and 38 (26.76%) non-AD type dementia) who underwent LP between 2015 to 2021 were analyzed. Using post-LP results and MTA ratings, 74 (52.11%) patients met the AT(N) criteria for AD. 56 (39.44%) patients (28 out of 53 (50.0%) MCI, 12 out of 51 (21.43%) DAT, and 16 out of 38 (28.57%) non-AD dementia) had a change in diagnosis following LP. 13 (9.15%) patients developed side-effects post-LP (11 (84.62%) patients had headache, 1 (7.69%) patient had backache, and 1 (7.69%) patient had headache and backache). 32 (22.54%) patients had a change in management post-LP, 24 (75.0%) had medication changes, 10 (31.30%) had referrals to other specialists, and 3 (9.40%) was referred for clinical trial with disease modifying interventions.

CONCLUSION

LP is well-tolerated in YOCD and can bring about relevant clinical decisions with regards to the diagnosis and management of this complex clinical condition.

Association of intraocular pressure and postoperative nausea and vomiting after microvascular decompression - a prospective cohort study

BACKGROUND

Postoperative nausea and vomiting is common in patients receiving microvascular decompression. In the current study, we examined whether postoperative nausea and vomiting is associated with reduced intraocular pressure (IOP) after microvascular decompression, a measure that reflects intracranial pressure.

METHODS

This is a prospective cohort study. Adult patients scheduled for microvascular decompression surgery for hemifacial spasm between January 2020 and August 2020 were eligible. IOP was measured immediately before anesthesia induction and 30 min after patients regained complete consciousness using non-contact tonometry. IOP reduction was defined by at least 1 mmHg decrease vs. preoperative baseline. The primary outcome was vomiting on postoperative day 1.

RESULTS

A total of 103 subjects were enrolled. IOP was reduced in 56 (54.4%) subjects. A significantly greater proportion of patients with IOP reduction had vomiting on postoperative day 1 (51.8% (29/56) vs. 23.4% (11/47) in those without IOP reduction; p = 0.003). In the multivariate regression analysis, vomiting on postoperative day 1 was associated with female sex [odds ratio = 7.87, 95% CI: 2.35-26.32, p = 0.001] and IOP reduction [odds ratio = 2.93, 95% CI: 1.13-7.58, p = 0.027].

CONCLUSIONS

In patients undergoing microvascular decompression surgery, postoperative IOP reduction is associated with postoperative vomiting.

TRIAL REGISTRATION

Chinese Clinical Trial Registry: ChiCTR2000029083 . Registered 13 January 2020.

Postdural Puncture Headache-Risks and Current Treatment

PURPOSE OF REVIEW

This manuscript aims to review the risks and the current treatments for postdural puncture headache (PDPH).

RECENT FINDINGS

PDPH is a relatively frequent complication after neuraxial blocks. It is typically orthostatic in nature, presenting as a positional and dull aching or throbbing headache, with added dysregulation of auditory and/or visual signals. Certain characteristics, such as female sex and young age, may predispose patients to the development of PDPH, as may factors such as previous PDPH, bearing down during the second stage of labor, and the neuraxial technique itself. Long-term complications including chronic headache for years following dural puncture have brought into question of the historical classification of PDPH as a self-limiting headache. So far, the underlying mechanism governing PDPH remains under investigation, while a wide variety of prophylactic and therapeutic measures have been explored with various degree of success. In case of mild PDPH, conservative management involving bed rest and pharmacological management should be used as first-line treatment. Nerve blocks are highly efficient alternatives for PDPH patients who do not respond well to conservative treatment. In case of moderate-to-severe PDPH, epidural blood patch remains the therapy of choice. An interdisciplinary approach to care for patients with PDPH is recommended to achieve optimal outcomes.

Evaluation of the Effects of Oral Magnesium Sachet on the Prevention of Spinal Anesthesia-Induced Headache After Cesarean Section: A Randomized Clinical Trial

Background: Post-dural puncture headache (PDPH) is a common complication of spinal anesthesia. It often goes away after a few days but may be more severe in some patients and persists for weeks. Objectives: This study aimed to evaluate the effect of oral magnesium on the prevention of PDPH after cesarean section for the first time. Methods: In this double-blind, randomized clinical trial, 100 candidates for elective cesarean section under spinal anesthesia were randomly divided into 2 groups: (i) the intervention group that received 300 mg of oral magnesium powder and (ii) the control group that received starch powder. The frequency and severity of headache and amount of analgesic consumption in both groups were measured 1, 2, and 3 days after cesarean section. Data were analyzed using SPSS version 22 at 95% CI. Results: The frequency of PDPH 1, 2, and 3 days after surgery was 8% vs 24% (P = 0.029), 10% vs 26% (P = 0.039), and 12% vs 18% (P = 0.401) in the intervention and control groups, respectively. The mean and SD of pain severity was 0.52 ± 1.83 vs 1.5 ± 2.84 (P = 0.03) on the first day, 0.70 ± 2.19 vs 1.58 ± 2.86 (P = 0.05) on the second day, and 0.82 ± 2.32 vs 1.18 ± 2.62 on the third day (P = 0.43) in the intervention and control groups, respectively. Although more patients in the control group received rescue analgesia, no significant difference was seen between the 2 study groups. Conclusions: In women candidates for cesarean section, oral administration of 300 mg magnesium 2 hours before surgery significantly reduces the frequency and severity of PDPH, but its impact on reducing analgesic consumption is not significant.

Transnasal sphenopalatine ganglion block for postdural puncture headache in obstetric patients: A Malaysian experience report

Postdural puncture headache (PDPH) is a common complication among obstetric patients after neuraxial anaesthesia. Conservative management may be associated with compliance issues, whereas the gold standard treatment, the epidural blood patch, is invasive and can result in serious complications. Transnasal sphenopalatine ganglion (SPG) block has recently emerged as a non-invasive treatment modality for PDPH. We describe our experience in performing transnasal SPG block by using modified techniques and different drug regimens at our centre. Dexamethasone was used as an adjuvant in transnasal SPG block for PDPH and has not been reported in other studies. Our first patient showed complete resolution of PDPH, and our second patient had a partially resolved headache subsequently requiring an epidural blood patch.

Intracranial Subdural Hematoma Versus Postdural Puncture Headache Following Epidural Anesthesia: A Case Report

Headache is a relatively common complaint following dural puncture whether it is diagnostic (lumbar puncture) or unintentional (e.g., after epidural anesthesia). Although postdural puncture headache (PDPH) turns out to be the culprit in many cases, other serious etiologies should be ruled out such as postepidural intracranial subdural hematoma (PEISH). PEISH is usually overlooked because it is relatively rare and due to other frequent causes of headache (e.g., tension headache, migraine, and PDPH) being the main consideration. PEISH can be easily misdiagnosed as PDPH because of similar clinical manifestations. Herein, we report a case of this rare complication and demonstrate the major differences between PDPH and PEISH. This 27-year-old woman with intrauterine fetal death of dizygotic twins complained of severe headache immediately following receiving epidural anesthesia for labor induction. The patient was initially diagnosed with PDPH, and a blood patch was placed which provided complete resolution of the headache only for two days. Computed tomography of the brain revealed a small subdural hematoma over the left frontal convexity. Conservative management with close monitoring was recommended in this case due to the small size of the hematoma and absence of intracranial mass effect. An early follow-up CT scan showed complete and spontaneous resolution of the hematoma. In patients with recurrence or change in the pattern of the headache, persistence of headache despite treatment, and presence of neurological dysfunction following epidural anesthesia, suspicion of intracranial etiology must be raised. Therefore, knowledge of this condition and differentiating it from PDPH is necessary to avoid misdiagnosis and futile attempts of treatment.