J Trauma
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The mechanism for clearing the cervical spine in patients with altered mental status remains controversial. Recommendations have ranged from removal of the cervical collar after 24 hours in patients with normal radiographs, to indefinite immobilization in a cervical collar, and recently cervical flexion-extension examinations using dynamic fluoroscopy. The purpose of this study was to evaluate the efficacy and safety of dynamic fluoroscopy flexion-extension examinations in identifying ligamentous cervical spine injury and clearing the cervical spine in patients with altered mental status after trauma. ⋯ Unstable cervical spine ligamentous injury without fracture is a rare occurrence. The cervical spine may be cleared after a normal cervical spine series (plain radiograph and computed tomographic scan) as recommended in the 1998 Eastern Association for the Surgery of Trauma guidelines. If dynamic fluoroscopy is to be used, adherence to the protocol, including review of the cervical spine radiographs before fluoroscopy and visualization of the entire cervical spine, C1-T1, is mandatory to ensure patient safety.
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Intracavity infusion of fibrin sealant-based agents, as a novel modality to control internal bleeding, is associated with an increase of pneumoperitoneum (PP) pressure. The safe limit of such increase has not been well defined in hypovolemic subjects. The purpose of this study was to evaluate the hemodynamic and metabolic effects of increasing PP pressure and to define the limits of carbon dioxide (CO2) insufflation in a controlled hemorrhage rat model. ⋯ The safe limit of PP pressurization with CO2 is dependent on the amount of blood loss. In this mechanically ventilated rat model, increasing the amount of blood loss from 0 to 15 mL/kg reduces the tolerable level of abdominal insufflation pressure from 15 mm Hg to 5 mm Hg. A 5-mm Hg PP pressure appears safe even in the most severely hemorrhaged animals.
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Comparative Study
Accurate deployment of vena cava filters: comparison of intravascular ultrasound and contrast venography.
The increasing use of vena cava filters by trauma surgeons has led to reports of filter placement using intravascular ultrasound (IVUS). Although attractive because of its ease of use and elimination of contrast and radiation, no studies have examined the accuracy of filter placement by IVUS as compared with contrast venography (CV). The purpose of this study was to compare the anatomic information obtained by both techniques during filter placement. ⋯ IVUS is a more accurate method of localizing the renal veins and measuring vena cava diameter for placement of vena cava filters than contrast venography.
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Motor vehicle crashes (MVCs) are one of the leading causes of death in the nation and in New York State, particularly among younger adult males. It is important to study how to reduce mortality from MVCs. ⋯ Risk-adjusted inpatient mortality rates for victims of MVCs may not yield a fair comparison of performance for different levels of care or for different hospitals because of differences in how quickly emergency department patients are admitted to the hospital. A more equitable way to assess hospital mortality rates may be to include emergency department deaths in addition to inpatient deaths.