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Biomedical subjects

D Covington

Publications and source records attributed to D Covington.

11 recordsLinked to original sources
PubMed2001

Synthetic membrane neo-pericardium facilitates total artificial heart explantation.

BACKGROUND: In the past, explantation of the Cardio West total artificial heart (TAH) has been technically challenging because of the presence of dense adhesions and extremely thickened pericardium. To prevent this, we constructed a synthetic neo-pericardium in 14 patients. METHODS: Using expanded polytetrafluoroethylene (e-PTFE) membrane, we constructed a pericardium within the pericardium, or "neo-pericardium," completely covering the Cardio West TAH separating the native atria from the native pericardium, and wrapping the ascending aorta from the outflow conduit distally for about 5 to 7 cm. RESULTS: Of the 14 patients, 9 were transplanted and could be evaluated, 3 died on device support, and 2 are currently on device support. In each case, we attained faster (by 25 minutes) and easier reentry through the sternum. Surgical planes around the aorta, over the right and left atria, and throughout the pericardial space became apparent immediately after e-PTFE membrane removal. The pericardium and related tissues although slightly thickened (<2 mm) were pliable compared with our previous 36 patients, with very thick adherent pericardium over the device and native atria. CONCLUSIONS: The plastic materials forming the ventricular housing and drivelines of the Cardio West TAH and the Dacron outflow conduits have in the past caused profound local inflammatory reactions, resulting in extremely dense adhesions and thickened adherent pericardium. Using e-PTFE membrane to fashion a complete neo-pericardium and to wrap the ascending aorta at the time of Cardio West implantation dramatically reduces adhesions and pericardial thickening and facilitates explantation.

Adult↗
PubMed2000

An analysis of trends, perceptions, and use patterns of electronic medical records among US family practice residency programs.

BACKGROUND AND OBJECTIVES: This study intended to quantify electronic medical record (EMR) use in family practice residencies, associate program characteristics with EMR use, and identify perceptions and issues about the use of EMRs. METHODS: A survey was mailed to all 454 US family practice residency programs, with a 72% response rate. The survey, which was pretested and revised, was designed to identify benefits, problems, perceptions, and trends regarding the use of EMRs. RESULTS: Fifty-five of 329 programs (17%) were using an EMR, while 10 (3%) had used an EMR but discontinued. Programs in the South reported the highest EMR use (21%, 21/99), and those in the North Central region reported the lowest use (11%, 11/102). EMR use was highest in university settings (19%, 15/81), programs offering fellowships (26%, 24/92), new programs (36%, 18/48), and programs that require research (22%, 20/91). Of the 329 programs that responded, 43% (143 programs) reported having information systems (IS) committees. Of the 55 programs currently using EMRs, 78% had at least one full-time equivalent IS technician. Of programs that discontinued use, software inadequacy was the most frequently cited reason (40%, 4/10). Programs that had never used EMR systems (n = 264) were more likely than those that had used EMRs (n = 65) to favorably perceive EMRs with respect to 1) meeting program requirements (44% versus 34%), 2) documenting improved patient care (65% versus 43%), 3) providing a reliable research database (94% versus 55%), and 4) documenting resident experience (92% versus 53%). Of the 264 (80%) programs that had never used an EMR, 172 (65%) plan to implement one. CONCLUSIONS: EMR use is low among US family practice residency programs, but some success in implementation of EMRs has been achieved. Based on the responses to this survey, use will likely increase from 55 of 329 programs (17%) to 153 of 329 (47%) by 2000.

Family Practice↗
PubMed1998

DRG reimbursement: geriatric hip fractures in the community hospital trauma center.

BACKGROUND: The purpose of this paper was to determine whether Medicare reimbursement for hip fracture reaches cost in geriatric patients. METHODS: We conducted a retrospective review using the hospital trauma registry. Demographics, operations, length of stay, clinical outcome, discharge disposition, hospital charges, and hospital costs were reviewed and compared with diagnosis-related group (DRG) reimbursement. RESULTS: The study included 153 Medicare patients. Mortality was 3.9%, 71% were discharged to a nursing home or rehabilitation unit, and 25% went directly home. DRG reimbursement constituted 58% of charges. Compared with costs, the DRG amount represented a mean loss of nearly $1,000 per patient. CONCLUSIONS: DRG reimbursement undercompensates the community hospital trauma center for treating a common malady among the geriatric population. A population shift toward the elderly, decreasing Medicare remuneration, and the advance of managed care will make correct identification and control of costs extremely important for the hospital caring for hip fractures in the geriatric population.

Aged↗
PubMed1998

Breast conservation surgery for breast cancer at a regional medical center.

BACKGROUND: This study examined trends in breast conservation surgery (BCS) at our hospital and factors associated with BCS. METHODS: We retrospectively reviewed breast cancer surgeries in patients eligible for BCS (size <4 cm, N0, N1) from 1990 through 1996 (n = 634). We calculated the yearly prevalence of BCS and used multiple logistic regression (MLR) to determine tumor, patient, and surgeon factors associated with BCS. RESULTS: BCS increased from 17% in 1990 to 41% in 1996. Women with T1a and T1b tumors were 3.8 and 2.0 times, respectively, as likely to have BCS compared with those who had T2 tumors. Other factors associated with BCS included nonpalpable tumors, age <50, Medicare, Medicaid, or self-pay patients, and women whose surgeons graduated since 1961, with odds ratios of 1.8, 1.9, 2.4, and 2.3, respectively. CONCLUSION: Women with small, nonpalpable tumors, age <50, without private insurance, operated on by younger surgeons were more likely to receive BCS.

Adult↗
PubMed1994

The financial impact of intentional violence on community hospitals.

The purpose of this study was to examine the financial impact of assault-related penetrating trauma. We specifically reviewed hospital charges and reimbursement data. Two hundred eleven patients were identified from our Trauma Registry in a 4-year period: 108 with firearm injuries and 103 with injuries related to cutting or piercing instruments. Assault-related penetrating injuries generated more than $2,000,000 in hospital charges. Sixty-seven percent of this amount was incurred by patients who had no source of third-party payment. Reimbursement covered only 30% of charges. There were no differences in demographics, procedures, or in insurance status, mean charges, and unpaid balances between patients directly admitted and those transferred from other hospitals. Financial losses incurred by community hospitals from the care of penetrating injuries are substantial, and must be borne by cost shifting or other strategies. No evidence of "dumping" was found among this group of patients. The specter of injury caused by intentional violence extends beyond urban trauma centers, and has a serious negative financial impact on community trauma centers.

Adolescent↗
PubMed1993

Ulcerative and plaque-like tracheobronchitis due to infection with Aspergillus in patients with AIDS.

Tracheobronchitis is an uncommon manifestation of infection due to Aspergillus species, occurring in < 7% of cases of pulmonary aspergillosis. At least 58 cases of invasive aspergillus tracheobronchitis have been described since 1962. We describe four patients with AIDS, all of whom were severely immunocompromised, who had ulcerative tracheobronchitis due to Aspergillus species demonstrated histologically. Three patients had received corticosteroids or were neutropenic at presentation. At bronchoscopy, three patients had some degree of diffuse tracheobronchitis, multiple ulcerative or "plaque-like" inflammatory lesions, and occasionally nodules involving the mainstem and segmental bronchi. The remaining patient had a single deep ulceration of the proximal trachea. Aspergillus was isolated from biopsy specimens from all four patients. There were varied degrees of invasion of the mucosa, submucosa, and cartilage on histological examination in three patients, one of whom had evidence of disseminated aspergillosis. Two patients subsequently developed pulmonary parenchymal disease due to Aspergillus. A review of aspergillus tracheobronchitis, including a discussion of airway disease in patients infected with human immunodeficiency virus, is presented.

AIDS-Related Opportunistic Infections↗
PubMed1991

Patient awareness of health precautions after splenectomy.

Sepsis after splenectomy is a lifelong risk, and patients who have had splenectomy should be educated about this risk. This study examines patient knowledge after splenectomy. We reviewed hospital records of 118 patients who had splenectomies performed between 1982 and 1988 at New Hanover Memorial Hospital. Twenty-four patients have died since their surgery; one death was suspected to be due to postsplenectomy sepsis. Of the 89 patients alive and eligible for follow-up, we were able to query 63. Only 16% were aware of any health precautions. After prompting, patient awareness improved to 40%. We also surveyed 11 of the 14 surgeons who performed the splenectomies. They indicated that they always discuss with their patients the immunologic consequences of spleen removal and the increased risks of infection, although they do not always recommend pneumococcal vaccine. We conclude that splenectomy patients have a low level of knowledge about postsplenectomy infection risks and precautions. We developed an educational pamphlet to aid the surgeon in patient education.

Awareness↗
PubMed1991

Cardiac output measurement in critical care patients: Thoracic Electrical Bioimpedance versus thermodilution.

Thoracic Electrical Bioimpedance (TEB) is a method for measuring cardiac performance which is noninvasive, continuous, has minimal technical requirements, and no patient risk. We used a commercially available TEB device to measure cardiac output in patients with thermodilution catheters in place. We compared the cardiac output measurements for the two modalities. We also compared the average hospital cost for initial cardiac assessment using the two techniques. The mean difference between the two cardiac output measurements was small (0.23 +/- 0.56) and not affected by the magnitude of the cardiac output readings. There was a strong correlation between COTD and COTEB (r = 0.91) and the regression slope was 0.91 with a Y intercept of 0.76. Cost analysis demonstrated that the use of TEB was approximately $600 less than thermodilution. Thoracic electrical bioimpedance measurement of cardiac output may offer a valuable alternative to the invasive measurement of the thermodilution catheter.

Adolescent↗
PubMed1989

Infrequency of blacks among patients having carotid endarterectomy.

We reviewed demographic data on patients having 2,256 carotid endarterectomies in eight large hospitals in North Carolina to determine the frequency of blacks among these patients. Blacks comprised only 4.6% of the patients having carotid endarterectomy even though they comprised 26% of all patients discharged and 22% of the general population of the state. Data from the National Inpatient Profile of the Commission on Professional and Hospital Activities, which represents patients discharged from short-term, nonfederal hospitals throughout the United States, show that nationwide, blacks comprise only 2.7% of the patients having carotid endarterectomy, whereas they comprise 12.0% of all patients discharged, 12.1% of the general population, and 10.7% of patients discharged following Class I surgical procedures. Blacks have only 67 carotid endarterectomies per 100,000 patients discharged; this rate is five or more times higher in whites. Among black patients having carotid endarterectomy, women predominate, whereas men predominate among white patients having carotid endarterectomy (p = 0.006). The underrepresentation of blacks among patients having carotid endarterectomy lends support to the concept that carotid vascular disease in blacks is distributed intracranially rather than extracranially as opposed to the extracranial rather than intracranial distribution in whites.

Adult↗
PubMedDate not supplied

Who gets screened during pregnancy for partner violence?

CONTEXT: Despite recommendations to screen prenatal care patients for partner violence, the prevalence of such screening is unknown. OBJECTIVES: To estimate the statewide prevalence of partner violence screening during prenatal care among a representative sample of North Carolina women with newborns and to compare women screened for partner violence with women not screened. DESIGN, SETTING, AND PARTICIPANTS: This investigation examines data gathered through the North Carolina Pregnancy Risk Assessment Monitoring System, a random sample of more than 2600 recently postpartum women who were delivered of newborns between July 1997 and December 1998. MAIN OUTCOME MEASURES: Self-reports of violence, health service factors, and sociodemographic characteristics. ANALYSIS: The prevalence of screening was computed, and odds ratios and 95% confidence intervals were used to examine bivariate and multivariable associations between being screened for partner violence and other factors. RESULTS: Thirty-seven percent of women reported being screened for partner violence during prenatal care. Logistic regression analysis found that women were more likely to be screened if they received prenatal care from (1) a public provider paid by a public source; (2) a private provider paid by a public source; or (3) a public provider paid by a private source. CONCLUSIONS: These findings suggest that the majority of prenatal care patients in North Carolina are not screened for partner violence. Screening appears to be most highly associated with whether a woman is a patient in the public sector or the private sector, and with the source of payment for prenatal care. Arch Fam Med. 2000;9:1093-1099

Adolescent↗