PubMed Health⌕ Search

Biomedical subjects

B B Hackman

Publications and source records attributed to B B Hackman.

10 recordsLinked to original sources
PubMed1992

Suicide in the home in relation to gun ownership.

BACKGROUND: It has been suggested that limiting access to firearms could prevent many suicides, but this belief is controversial. To assess the strength of the association between the availability of firearms and suicide, we studied all suicides that took place in the homes of victims in Shelby County, Tennessee, and King County, Washington, over a 32-month period. METHODS: For each suicide victim (case subject), we obtained data from police or the medical examiner and interviewed a proxy. Their answers were compared with those of control subjects from the same neighborhood, matched with the victim according to sex, race, and age range. Crude and adjusted odds ratios were calculated with matched-pairs methods. RESULTS: During the study period, 803 suicides occurred in the two counties, 565 of which (70 percent) took place in the home of the victim. Fifty-eight percent (326) of these suicides were committed with a firearm. After excluding 11 case subjects for various reasons, we were able to interview 80 percent (442) of the proxies for the case subjects. Matching controls were identified for 99 percent of these subjects, producing 438 matched pairs. Univariate analyses revealed that the case subjects were more likely than the controls to have lived alone, taken prescribed psychotropic medication, been arrested, abused drugs or alcohol, or not graduated from high school. After we controlled for these characteristics through conditional logistic regression, the presence of one or more guns in the home was found to be associated with an increased risk of suicide (adjusted odds ratio, 4.8; 95 percent confidence interval, 2.7 to 8.5). CONCLUSIONS: Ready availability of firearms is associated with an increased risk of suicide in the home. Owners of firearms should weigh their reasons for keeping a gun in the home against the possibility that it might someday be used in a suicide.

Adult↗
PubMed1992

Comparative effects of fenoldopam mesylate and nitroprusside on left ventricular performance in severe systemic hypertension.

To compare the effects of fenoldopam (n = 15), a selective dopamine-1 agonist, and nitroprusside (n = 14) on left ventricular (LV) function in severely hypertensive subjects (diastolic blood pressure (BP) greater than 120 mm Hg), both agents were infused to reduce diastolic BP by 40 mm Hg (or less than 110 mm Hg). Indexes of LV systolic and diastolic functions were obtained using gated radionuclide angiography before the initiation of treatment and after targeted BP was achieved. Both fenoldopam and nitroprusside effectively reduced systolic and diastolic BP to target levels. Changes in heart rate, peak filling rate and relative end-diastolic volume were similar with both agents. Baseline ejection fraction increased after infusion of both drugs. The magnitude of the increase in ejection fraction was far greater with fenoldopam than with nitroprusside (+22% vs +8%; p = 0.04), despite a lesser reduction in systolic BP (-12 vs -22%, p = 0.002). Furthermore, the reduction in relative end-systolic volume (-35 vs -20%; p = 0.04), and increase in the ratio of peak systolic pressure to relative end-systolic volume (+43 vs +6%; p = 0.007) were greater after fenoldopam than after nitroprusside. The greater increment in parameters of LV systolic function produced by fenoldopam than by nitroprusside suggests an effect on LV performance that is independent of afterload reduction.

2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-ben↗
PubMed1991

Impact of portable pulse oximetry on arterial blood gas test ordering in an urban emergency department.

STUDY OBJECTIVE: To determine the impact of portable pulse oximetry on physician use of arterial blood gas tests (ABGs) in an urban emergency department. DESIGN: Prospective, controlled clinical trial. SETTING: The ED of the Regional Medical Center at Memphis, a publicly subsidized, 450-bed, acute care hospital staffed by residents and faculty of the University of Tennessee, Memphis. TYPE OF PARTICIPANTS: Rotating housestaff treating adult ED patients with a wide variety of medical and surgical problems. INTERVENTION: Introduction of a portable pulse oximeter for noninvasive measurement of blood oxygenation. MEASUREMENTS: Rates of ABG test ordering, housestaff reason(s) for ordering an ABG, and the incidence of adverse clinical outcomes before and after introduction of portable pulse oximetry. MAIN RESULTS: A total of 20,120 patient visits occurred during the four-month study. Before oximeter introduction, emergency physicians ordered 699 ABGs, 63% of which were indicated by explicit criteria. After oximeter introduction, 440 ABGs were ordered (a 37% decrease). Almost all of this decrease was due to fewer ABGs ordered to assess oxygenation (260 before vs 75 after; chi 2, P less than .001). These reductions were not explained by differences in total patient visits or case mix. Physicians decreased ordering of indicated ABGs by almost as great an extent as they reduced ordering of unindicated tests, suggesting they did not consistently distinguish between the two. However, decreased testing did not result in any serious adverse outcomes, defined as unanticipated respiratory or cardiac arrest in the ED, unanticipated arrest on the floor within 24 hours of admission, or death within two days of hospital discharge. CONCLUSION: Portable pulse oximetry can provide a simple, noninvasive way to determine oxygen saturation in the ED. Routine use of portable pulse oximetry may substantially reduce rates of ABG testing and associated patient charges without adversely affecting the quality of emergency care.

Adult↗
PubMed1991

Emergency departments and crowding in United States teaching hospitals.

STUDY OBJECTIVES: To assess the extent and distribution of hospital and emergency department crowding nationally. DESIGN: The research design consisted of a mailed questionnaire disseminated in the fall of 1988 to the member institutions of the National Association of Public Hospitals (NAPH) and the Council of Teaching Hospitals (COTH). TYPE OF PARTICIPANTS: Study participants included hospital administrators and ED directors from 239 of the non-Veterans Administration, general acute care, US members of COTH and NAPH. MEASUREMENTS: Key measures of hospital and ED crowding including mean ED holding times for floor and ICU beds. MAIN RESULTS: Three fourths of responding hospitals reported increases in ED visits over the preceding three years. Mean ED holding times for admitted patients were 3.5 hours (median, 2.0 hours) for a floor bed and 2.9 hours (median, 1.5 hours) for an ICU bed. Half of all hospitals noted maximum waits for floor and ICU beds of ten hours or more and seven hours or more, respectively. Measures taken by hospitals to manage crowding during August 1988 included restricting access to some types of patients (mean, 3.6 days), actively transferring patients to other hospitals (mean, 2.2 days), transfer refusal (mean, 2.8 days), and total ambulance diversion (mean, 1.6 days). CONCLUSIONS: Our study strongly suggests that ED crowding is not an isolated phenomenon; ED crowding and its attendant problems appear to affect hospitals with similar adverse effects regardless of ownership. Although our results suggest that ED crowding is concentrated in metropolitan areas and in a smaller subset of hospitals, we found instances of crowding among hospitals nationwide.

Bed Occupancy↗
PubMed1990

Patient 'dumping' post-COBRA.

To gauge the impact of the new federal patient transfer provisions following the federal Combined Budget Reconciliation Act of 1985 (COBRA), we monitored all emergency interhospital transfers to a public hospital emergency department in the Memphis, Tennessee area during three identical time periods: June 1 to August 31 of 1986, 1987, and 1988. A high number of transfers in the summer of 1986 diminished only slightly in summer 1987 (following implementation of COBRA). Far greater reductions occurred in summer 1988, when overcrowding forced our hospital to refuse most transfers. In contrast to changes in hospital policy, COBRA alone had little effect in this area.

Emergency Service, Hospital↗
PubMed1989

Dispatcher-assisted cardiopulmonary resuscitation. Validation of efficacy.

Dispatcher-delivered telephone instruction in cardiopulmonary resuscitation (CPR) has been proposed to increase rates of bystander CPR in cases of out-of-hospital cardiac arrest. We tested the efficacy of a previously developed CPR message using a recording mannikin in a high stress, simulated cardiac arrest scenario. Community volunteers were unaware they would perform CPR until immediately before each trial. Performance of volunteers without prior CPR training (group A, n = 65) who received telephone instruction was compared with that of previously trained volunteers (group B, n = 43) who received the same message. Performances of both groups were also compared with a third group (group C, n = 43) composed of previously trained volunteers who did not receive the message. Quality of CPR was graded by three CPR instructors using explicit criteria. Printout strips from the recording mannikins were also analyzed. Evaluators were unaware of the training status of volunteers. The three groups were of comparable sex, race, and educational level, but group C was significantly younger than groups A and B (31.7 vs. 37.7 years, p less than 0.001). Because of the time required for telephone instruction, groups A and B started chest compressions a mean of 4.0 minutes after collapse compared with 1.2 minutes for group C (p less than 0.0001). We found that the previously untrained volunteers of group A performed CPR of an overall quality comparable to that performed by previously trained members of group C. Group A performed chest compressions significantly better than group C (p less than 0.02) but had greater problems performing effective ventilations.(ABSTRACT TRUNCATED AT 250 WORDS)

Emergencies↗
PubMed1988

In-hospital resuscitation following unsuccessful prehospital advanced cardiac life support: 'heroic efforts' or an exercise in futility?

From our emergency department logbook we identified 281 consecutive patients transported to the Regional Medical Center at Memphis following failed prehospital advanced cardiac life support (ACLS). Medical records were obtained for 240 cases (85.4%). Initial cardiac rhythms in the ED included ventricular fibrillation or pulseless ventricular tachycardia (29%), electromechanical dissociation (18%), and asystole (51%). Thirty-two patients (13.3%) were successfully resuscitated in the ED, but only four (1.7%) survived to hospital discharge. Two patients had good neurologic outcomes; both degenerated to cardiac arrest shortly prior to arrival in the ED. The remaining two survivors were discharged to nursing homes with severe neurologic deficits. Of the 41 cases for whom no medical records could be found, 39 were noted in our logbook to have died in the ED. No record of subsequent hospital admission could be found for the other two. Both are presumed to have died. Failure to respond to prehospital ACLS predicts nonsurvival and may warrant cessation of efforts in the field. Future programs and research efforts in the management of out-of-hospital cardiac arrest should be focused on optimal provision of prehospital care prior to the onset of irreversible deterioration.

Emergencies↗
PubMed1988

Emergency department patient 'dumping': an analysis of interhospital transfers to the Regional Medical Center at Memphis, Tennessee.

To study the extent and nature of transfers of emergency department (ED) patients because of inability to pay, we audited all telephone requests and actual patient transfers from private hospital EDs and their affiliated free-standing emergency centers to the ED of the Regional Medical Center at Memphis (the Med), a publicly subsidized hospital, between June 1 and August 31, 1986. Transfers to the Med's "special care" centers were assumed to represent tertiary care referrals and were excluded. During the 92-day study interval, ED physicians at the Med handled 190 telephone requests for transfer. Requesting physicians explicitly identified "no money" or "no insurance" as the primary reason for transfer in 89 per cent of 164 cases in which these data were recorded. Thirty-seven per cent of requests were refused; half were too unstable or required an intensive care unit (ICU) bed when none were available. One hundred forty-six transfers (55 per cent) arrived without prior telephone authorization, most by private automobile. Almost all transferred patients (91 per cent) were sent for primarily economic reasons. One out of four was found to be unstable on arrival by explicit clinical criteria. Eighty-two patients transferred for economic reasons (34 per cent) required emergency hospitalization and accounted for 564 bed days during a period of extreme inpatient crowding. Three patients died prior to discharge. Two had been transferred for primarily economic reasons.

Emergency Service, Hospital↗