Abstract
Post-dural puncture headache (PDPH) is a severe positional headache that appears usually within 72 hours after inadvertent dural puncture, secondary to cerebrospinal fluid leakage. It is treated first by conservative treatment (including bed rest, hydration, caffeine and simple analgesia) and then by invasive procedures such as blood patch. This study aims to evaluate factors associated with PDPH among a sample of Lebanese patients and assess the rate of success of different treatment modalities administered in a specific sequence: conservative treatment first, then ultrasound-guided bilateral greater occipital nerve block (GONB) if failure of conservative treatment and finally epidural blood patch (EBP) if failure of GONB. A retrospective case-control study was conducted between January 2015 and December 2019 in the Notre-Dame des Secours University Hospital. Out of a total of 10,051 procedures, 18 cases were diagnosed with PDPH and were matched based on gender, age and procedure type to a control group of patients who did not develop PDPH randomly selected (72 patients). Higher body mass index (adjusted odds ratio (ORa) = 0.77) was significantly associated with lower odds of PDPH, whereas the presence of previous chronic headache (ORa = 5.56) was significantly associated with higher odds of PDPH. Seven out of 18 (38.89%) had their pain symptoms/headache resolved on conservative treatment. Out of the remaining 11 patients, 6 (33.33%) had their symptoms resolved on GONB with a significant decrease in the pain score 48 hours after GONB compared to baseline (5.55 vs 9.73; p = 0.007). Five patients (27.78%) had their symptoms resolved using a blood patch, with a significant decrease in the pain score after blood patch compared to baseline (3.00 vs 9.80; p = 0.041). Our preliminary data suggest that ultrasound-guided GONB is a minimally risky and efficacious technique for those who fail to respond to conservative treatment.
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