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Biomedical subjects

S Syverud

Publications and source records attributed to S Syverud.

8 recordsLinked to original sources
PubMed1999

Academic juggling.

Explore the source record for details and available documents.

Adaptation, Psychological↗
PubMed1994

Comparison of digital versus metacarpal blocks for repair of finger injuries.

STUDY OBJECTIVE: This study compared efficacy, degree of discomfort, and time to anesthesia of digital blocks and metacarpal blocks for digital anesthesia. DESIGN: Randomized, prospective, nonblinded, clinical study conducted from April 1992 to January 1993. Patients served as their own controls. SETTING: Inner-city and community hospital emergency departments. TYPE OF PARTICIPANTS: Convenience sample of 30 adult patients, with third or fourth finger injuries including and distal to the proximal interphalangeal joint that required digital anesthesia. INTERVENTIONS: Digital blocks and a metacarpal blocks were performed (one per side) on all 30 patients (total of 60 blocks). The order of the blocks was randomized. MEASUREMENTS: A digital block and a metacarpal block were performed on each patient. Patients immediately rated the pain associated with each technique on a nonsegmented visual analog scale. Efficacy was assessed by requirement for additional anesthesia and anesthesia to pinprick. Time to anesthesia was assessed after each block in 23 patients. RESULTS: Mean visual analog scale pain scores were 2.53 for digital block and 3.38 for metacarpal block (P = .1751, Student's t-test). Metacarpal block failed anesthesia to pinprick in 23% of patients compared to 3% for digital block (P = .0227, chi 2). Time to anesthesia was significantly shorter for digital block compared to metacarpal block, with a mean of 2.82 minutes versus 6.35 minutes (P < .0001, Student's t-test). CONCLUSION: Digital block and metacarpal block, as described in this study, are equally painful procedures. Digital block, however, is more efficacious and requires significantly less time to anesthesia for the injured finger.

Adult↗
PubMed1992

Improved outcome with early blood administration in a near-fatal model of porcine hemorrhagic shock.

Current recommendations for the preoperative management of hemorrhagic shock include the initial infusion of 2 L of isotonic crystalloid regardless of the severity of hemorrhage. While this approach may be adequate for patients who experience only mild to moderate hemorrhagic insults, it has never been tested in a clinically relevant model of severe life-threatening hemorrhage. The authors used a porcine model of rapidly fatal hemorrhage with a reproducible and relevant physiologic end-point, the absence of vital signs, to test the hypothesis that even brief delays in blood replacement may result in higher mortality rates and worsen hemodynamic and metabolic responses to hemorrhage. Twenty-four immature swine (11-17 kg) were bled continuously at a decelerating rate until the following criteria were met: (1) respiratory arrest, (2) a pulse pressure of 0 and, (3) a slowing of cardiac electrical activity of 15% or more. Resuscitation was begun 1 minute later. The animals were randomly assigned to one of three resuscitation regimens. Group A (n = 8) received shed blood at a rate of 3 mL/kg/min for 10 minutes followed by normal saline (NS) at a rate of 3 mL/kg/min for 10 minutes. Group B (n = 8) received NS at a rate of 3 mL/kg/min for 10 minutes followed by shed blood at a rate of 3 mL/kg/min for 10 minutes. Group C, controls, (n = 8) received NS at a rate of 3 mL/kg/min for 20 minutes. Animals were observed for 30 minutes after resuscitation or until death. Mortality was 25%, 37.5%, and 100% for groups A, B, and C, respectively (P < .05 for group C versus group A or B).(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗
PubMed1988

Cardiac pacing.

Pacemaker technology has become much more complex in the last ten years. Transcutaneous pacemakers now allow rapid institution of cardiac pacing in the Emergency Department and in the prehospital setting. Permanent pacemakers frequently have dual-chamber pacing and sensing capability as well as multiple programmable modes of operation. Traditional emergency pacing techniques, including transvenous emergency pacing, can now be used more selectively.

Arrhythmias, Cardiac↗
PubMed1984

Transcutaneous cardiac pacing.

Transvenous cardiac pacing is currently the pacing procedure of choice in patients with severe, life-threatening bradyarrhythmias that do not respond to pharmacotherapy. However, pacing catheters can be difficult to insert and frequently fail to capture in severely hypotensive patients. Therefore, there has been a recent resurgence of interest in external pacing methods. Newer transcutaneous cardiac pacing units are easy to apply and especially suited for unconscious patients with severe, life-threatening bradyarrhythmias. There is no operator danger and, if need be, cardiopulmonary resuscitation can continue while the electrodes are in place and the unit is operating. Human and animal studies to date have shown that there are no significant short-term clinical hazards or pathologic abnormalities when using this technique.

Bradycardia↗