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Biomedical subjects

David A Randall

Publications and source records attributed to David A Randall.

3 recordsLinked to original sources

Current management of penetrating injuries of the soft palate.

Children present to emergency departments with soft palate impalement injuries on an infrequent though periodic basis. Although these usually heal without treatment, internal carotid artery thrombosis occurs on rare occasions due to vessel compression causing intimal disruption. Thirty-two cases have been reported in the English literature. Hospital observation for up to 72 hours had been recommended previously for all of these injuries because of a "lucid interval," usually present before onset of neurologic symptoms. Subsequent studies have shown a very low occurrence of carotid injury and support outpatient observation similar to that after minor head injury. This is further justified by the lack of evidence that any diagnostic study or therapeutic measure alters the ultimate prognosis and outcome. Laceration repair is suggested for retained foreign bodies, through and through injury, or if a large hanging flap is present. Antibiotic indications are not well defined but should be considered for lacerations over 1 to 2 cm in length.

Carotid Artery Injuries↗

Evidence for large decadal variability in the tropical mean radiative energy budget.

It is widely assumed that variations in Earth's radiative energy budget at large time and space scales are small. We present new evidence from a compilation of over two decades of accurate satellite data that the top-of-atmosphere (TOA) tropical radiative energy budget is much more dynamic and variable than previously thought. Results indicate that the radiation budget changes are caused by changes in tropical mean cloudiness. The results of several current climate model simulations fail to predict this large observed variation in tropical energy budget. The missing variability in the models highlights the critical need to improve cloud modeling in the tropics so that prediction of tropical climate on interannual and decadal time scales can be improved.

Journal Article↗

Epistaxis packing. Practical pointers for nosebleed control.

Primary care physicians often encounter epistaxis. Its treatment may involve nasal sponge tampons, double-balloon nasal catheters, and anterior gauze with posterior Foley catheters, depending on the location of the bleed. Topical anesthetic and decongestant agents are essential, and intravenous analgesia, which enhances comfort, should be considered in all cases. Here, Dr. Randall investigates the practical aspects of epistaxis therapy and provides a simplified approach to treatment using three types of packs that work in virtually every situation.

Epistaxis↗