Faculty Of Medicine Minia University

This trial aims to study the effect of photoactivated disinfection using Diod laser (810 nm) to activate photosensitive nanoparticle chitosan as an endodontic irrigant versus sodium hypochlorite followed by saline and then EDTA 17% on 1) postoperative pain and 2) the success of revascularization in patients with necrotic immature maxillary anterior teeth using a randomized clinical trial design.

assessing septic patients with a noninvasive ultrasound protocol, and earlier identification of fluid overload to help clinicians decide whether to administer supplemental fluid therapy or suspend its administration and to evaluate the possible relation between the different VExUS grades and the adverse effects of intensive fluid administration

Post-dural puncture headache (PDPH) is a well-recognized and potentially serious complication of subarachnoid block. While advancements in spinal needle design have reduced its incidence in recent years, PDPH still affects a notable percentage of post-partum patients undergoing spinal anaesthesia, with rates ranging from 0.5% to 2%. Factors such as female gender, pregnancy, young age, low body mass index, dilutional anemia, and the preference for neuraxial anaesthesia during caesarean section (CS) increase the vulnerability of obstetric patients to PDPH. Therefore, managing this complication is critically important in obstetric anaesthesia.
The exact cause of PDPH remains unclear, but there is substantial evidence suggesting that it stems from reduced cerebrospinal fluid (CSF) pressure due to continuous leakage through a dural tear, which exceeds the rate of CSF production. This imbalance can lead to PDPH, as even a modest loss of CSF volume (as little as 10%) can trigger traction on pain-sensitive intracranial structures when in an upright position, compounded by reflexive vasodilation.
Various treatment strategies have been proposed, typically including bed rest in a supine position, fluid therapy, analgesics, and medications such as sumatriptan and caffeine.
Dexmedetomidine (DEX) is a highly specific agonist of α2-adrenoreceptors known for inducing cooperative sedation, anxiolysis, and analgesia while minimizing respiratory depression. Additionally, it has been shown to mitigate the stress and inflammatory response triggered by surgical and anaesthetic procedures. Activation of α2-receptors in the substantia gelatinosa of the dorsal horn suppresses the firing of nociceptive neurons and inhibits the release of substance P. Furthermore, stimulation of these receptors in the locus coeruleus, a key modulator of nociceptive transmission, interrupts the transmission of pain signals, resulting in analgesia. Dexmedetomidine has been administered via intranasal and inhalational routes for various purposes, including premedication, sedation, and post-operative analgesia.
Lidocaine nebulized is a novel method used recently for PDPH. Intranasal lidocaine can offer sphenopalatine ganglion block which can facilitate acute pain reduction in PDPH.