Clinical Research Directory

Sphenopalatine Ganglion Nerve Block for Postdural Puncture Headache in Obstetrics

The SNOB study is a prospective, randomized, double-blind, placebo-controlled, cross-over pragmatic trial that has been designed in accordance with the CONSORT guidelines. Patient recruitment will occur in the postnatal unit or emergency room, where the patient first presents with PDPH following epidural or CSE for labor or cesarean delivery. We will endeavor to perform anesthesia ward rounds daily in postnatal wards to assess for possible PDPH. Patients will also be identified who return to labor and delivery or the emergency room with complaints of headache following hospitalization that included epidural or CSE during delivery. The RCT intervention is sphenopalatine ganglion nerve block (SPGNB). The active drug is 4% lidocaine (LIDO group); placebo control is saline (SALINE group). The sphenopalatine ganglion is shown in Figure 1. Owing to its location at the posterior wall of the nasopharynx, the SPGNB is readily performed by non-invasive application of topical local anesthetic. Patients are positioned supine with a pillow under their shoulders with their chin raised, so that their neck is extended. Next, 1.5 mL of study drug (4% lidocaine solution or saline) is dripped slowly (over 15 seconds) into each nostril (total 3mL) via a plastic venflon i.v. cannula. The supine, extended-neck position is then maintained for 15 minutes. After that time, the patient is then asked to sit upright to assess the postural headache. If the postural headache is not sufficiently relieved, the procedure is immediately repeated, and may be repeated a third time if needed. Cross-over: After SPGNB, any patient with inadequate therapy (primary outcome; see below) may request to end the study and have an epidural blood patch. On initial enrollment they are advised that all patients requesting an epidural blood patch will be asked to receive an additional cross-over rescue dose of SPGNB which is the opposite of the drug (lidocaine or saline) allocated in their study group. Treatment for up to three 15 min intervals and subsequent assessment is exactly as for the study intervention (see above). If the PDPH is completely relieved by this cross-over medication, the patient will be advised to defer the EBP. If patients refuse the cross-over, this refusal is recorded but their initial request for EBP after the first series of randomized medications is analyzed as our primary endpoint. Outcomes: The primary outcome is initial success assessed after completion of the first series of SPGNB treatment with the study medication (LIDO vs SALINE) - irrespective of the number of treatments required (1, 2 or 3 applications, ie after 15, 30 or 45 min). There are two possible options at this stage: Adequate analgesia; patient does not wish to proceed to EBP; or Inadequate analgesia; patient wishes to proceed to EBP. Secondary outcomes: 1) Success or failure of the cross-over dose to treat PDPH and prevent EBP - irrespective of the number of treatments required (1, 2 or 3 applications, ie after 15, 30 or 45 min); 2) Number of repeat SPGNB treatments required for success in either the initial treatment series or the rescue cross-over series; 3) Time to headache on assuming upright posture; 4) Return to function using the Brief Pain Inventory http://www.npcrc.org/files/news/briefpain\_short.pdf - using the pain interference section (questions 9 A-G). 5) Standardized questionnaire (after each intervention): following questions - each with a binary answer Yes or No: Head/neck pain, Nausea, Photophobia, Tinnitus, Ear stuffiness, Diplopia. If the answer to head/neck pain is "yes", then there are supplementary questions: a) location, b) postural element to pain, c) time pain appears after upright posture, d) severity assessed by VAS 0-10 (11-point verbal scale), where 0=none and 10=worst imaginable.

Effect of Coffee on Postdural Puncture Headache After Cesarean Section

The purpose of this study is to investigate the effects of postoperative coffee consumption on postdural puncture headache (PDPH) and analgesic use in women undergoing cesarean section with spinal anesthesia.

Spenopalatine Ganglion Block for Treatment of Post-dural Puncture Headaches

Postdural puncture headache (PDPH) is a severe, debilitating complication of dural puncture that can arise from insertion of an epidural or spinal needle for labour analgesia. Presently, the conservative treatment options for PDPH have limited effectiveness and the gold standard treatment for PDPH, an epidural blood patch, is an invasive intervention with the potential for serious complications. There is a growing number of case reports and retrospective studies that suggest a sphenopalatine ganglion block (SPGB) with local anesthetic may offer an effective, safe, and easy-to-administer treatment option for PDPH in postpartum patients. We aim to conduct a feasibility study to assess whether a randomized controlled trial is feasible comparing whether early intervention SPGB with the option for repeat, patient self-administered SPGBs versus current standard conservative management can reduce the severity and duration of PDPH pain and improve patient functional status.

Neutrophil to Lymphocyte Ratio and Postdural Headache

This study will aim to investigate whether systemic inflammatory markers-especially the neutrophil-to-lymphocyte ratio (NLR)-obtained from preoperative complete blood counts can predict the development of post-dural puncture headache (PDPH) in obstetric patients undergoing cesarean section under spinal anesthesia.

A Prospective Cohort Study to Evaluate the Safety, Efficacy, and Usability of the EpiZact Device

The purpose of the study is to learn more about a new device, the EpiZact Epidural Device, that may be helpful for reducing the likelihood of wet tap when a labor epidural is placed. When epidurals are placed correctly the needle stops just in front of the space in the body that contains cerebrospinal fluid. When the epidural is advanced a short distance further, leakage of cerebrospinal fluid can occur. This is known as a wet tap. A wet tap can result in a severe headache and at times other complications. The goal of this clinical trial is to learn if the use of the EpiZact device prevents wet taps in pregnant women receiving epidurals for relief of labor pain. The main questions this study aims to answer are: 1. What the rate of wet tap with the EpiZact device? 2. What is the rate of failed epidural placement with the EpiZact device? All patients in the study will receive an epidural with the EpiZact device. The investigators will compare the results with patients not in the study that receive an epidural without the EpiZact device.