Biomedical subjects

Barbara Simon

Publications and source records attributed to Barbara Simon.

9 recordsLinked to original sources

PubMed2006

Exposure to automated drug alerts over time: effects on clinicians' knowledge and perceptions.

OBJECTIVE: We tested whether interval exposure to an automated drug alert system that included approximately 2000 drug-drug interaction alerts increased recognition of selected interacting drug pairs. We also examined other perceptions about computerized order entry. RESEARCH DESIGN: We administered cross-sectional surveys in 2000 and 2002 that included more than 260 eligible clinicians in each time period. SUBJECTS: We studied clinicians practicing in ambulatory settings within a Southern California Veterans Affairs Healthcare System and who responded to both surveys (97 respondents). MEASURES: We sought to measure (1) recognition of selected drug-drug and drug-condition interactions and (2) other benefits and barriers to using automated drug alerts. RESULTS: Clinicians correctly categorized similar percentages of the 7 interacting drug-drug pairs at baseline and follow-up (53% vs. 54%, P = 0.51) but improved their overall recognition of the 3 contraindicated drug-drug pairs (51% vs. 60%, P = 0.01). No significant changes from baseline to follow-up were found for the 8 interacting drug-condition pairs (60% vs. 62%, P = 0.43) or the 4 contraindicated drug-condition pairs (52% vs. 56%, P = 0.24). More providers preferred using order entry at follow-up than baseline (63% vs. 45%, P < 0.001). Signal-to-noise ratio remained the biggest reported problem at follow-up and baseline (54 vs. 57%, P = 0.75). In 2002, clinicians reported seeing a median of 5 drug alerts per week (representing approximately 12.5% of prescriptions entered), with a median 5% reportedly leading to an action. CONCLUSIONS: Interval exposure to automated drug alerts had little to no effect on recognition of selected drug-drug interactions. The primary perceived barrier to effective utilization of drug alerts remained the same over time.

Adult↗

PubMed2006

To use or not to use. What influences why women veterans choose VA health care.

BACKGROUND AND OBJECTIVE: Effects of advances in Department of Veterans Affairs (VA) women's health care on women veterans' health care decision making are unknown. Our objective was to determine why women veterans use or do not use VA health care. DESIGN AND PARTICIPANTS: Cross-sectional survey of 2,174 women veteran VA users and VA-eligible nonusers throughout southern California and southern Nevada. MEASUREMENTS: VA utilization, attitudes toward care, and socio-demographics. RESULTS: Reasons cited for VA use included affordability (67.9%); women's health clinic (WHC) availability (58.8%); quality of care (54.8%); and convenience (47.9%). Reasons for choosing health care in non-VA settings included having insurance (71.0%); greater convenience of non-VA care (66.9%); lack of knowledge of VA eligibility and services (48.5%); and perceived better non-VA quality (34.5%). After adjustment for socio-demographics, health characteristics, and VA priority group, knowledge deficits about VA eligibility and services and perceived worse VA care quality predicted outside health care use. VA users were less likely than non-VA users to have after-hours access to nonemergency care, but more likely to receive both general and gender-related care from the same clinic or provider, to use a WHC for gender-related care, and to consider WHC availability very important. CONCLUSIONS: Lack of information about VA, perceptions of VA quality, and inconvenience of VA care, are deterrents to VA use for many women veterans. VA WHCs may foster VA use. Educational campaigns are needed to fill the knowledge gap regarding women veterans' VA eligibility and advances in VA quality of care, while VA managers consider solutions to after-hours access barriers.

Choice Behavior↗

PubMed2005

Post-training lesions of the medial prefrontal cortex interfere with subsequent performance of trace eyeblink conditioning.

Rabbits were trained on trace eyeblink (EB) conditioning until they reached a criterion of 10 consecutive EB conditioned responses (CRs). Electrolytic lesions were made in the medial prefrontal cortex (mPFC) centered on the prelimbic area (Brodmann's area 32), at five different intervals after training. These included immediately, 24 h, 1 and 2 weeks, and 1 month after training. Separate groups of animals received sham lesions at these same intervals after training. After a 2 week postoperative recovery period, all animals were retested for 3 d on trace conditioning, using the same parameters used during preoperative training. Mean EB conditioning performance deficits occurred in the animals with mPFC lesions compared with sham-lesioned animals on the first day of retesting in all five groups. However, by the second or third day of retesting, the rabbits with lesions were performing at a level that was comparable with that of sham animals. Rabbits that received more posterolateral lesions of the neocortex did not, however, show postoperative conditioning deficits. A comparison of percentage EB CRs of animals with postoperative training with that of animals that received mPFC lesions before training suggests that the mPFC post-training lesions produce damage to a retrieval process and not to a storage site or an acquisition process.

Animals↗

PubMed2005

The PPAR(gamma) K422Q mutation does not contribute to troglitazone inefficiency in colon cancer treatment.

Peroxisome proliferator-activated receptor gamma (PPAR(gamma)) ligands inhibit cell growth of colorectal cancer cells in most experimental models, but no significant effect could be observed in patients with colorectal cancer. We therefore, screened human colorectal tumors to determine the prevalence of the PPAR(gamma) K422Q loss-of-function mutation, recently identified in 50% of colonic cancer cell lines. A sensitive allele-specific real-time amplification assay was developed and 170 colorectal primary tumors and 12 liver metastasis were analyzed. We did not find the K422Q mutation in any of these samples. We can therefore exclude this alteration as a mechanism of resistance to PPAR(gamma) ligands in patients with colon cancer.

Adult↗

PubMed2003

Adherence to pressure ulcer prevention guidelines: implications for nursing home quality.

OBJECTIVES: This study aims to assess overall nursing home (NH) implementation of pressure ulcer (PU) prevention guidelines and variation in implementation rates among a geographically diverse sample of NHs. DESIGN: Review of NH medical records. SETTING: A geographically diverse sample of 35 Veterans Health Administration NHs. PARTICIPANTS: A nested random sample of 834 residents free of PU on admission. MEASUREMENTS: Adherence to explicit quality review criteria based on the Agency for Healthcare Research and Quality Practice Guidelines for PU prevention was measured. Medical record review was used to determine overall and facility-specific adherence rates for 15 PU guideline recommendations and for a subset of six key recommendations judged as most critical. RESULTS: Six thousand two hundred eighty-three instances were identified in which one of the 15 guideline recommendations was applicable to a study patient based on a specific indication or resident characteristic in the medical record. NH clinicians adhered to the appropriate recommendation in 41% of these instances. For the six key recommendations, clinicians adhered in 50% of instances. NHs varied significantly in adherence to indicated guideline recommendations, ranging from 29% to 51% overall adherence across all 15 recommendations (P <.001) and from 24% to 75% across the six key recommendations (P <.001). Adherence rates for specific indications also varied, ranging from 94% (skin inspection) to 1% (education of residents or families). Standardized assessment of PU risk was identified as one of the most important and measurable recommendations. Clinicians performed this assessment in only 61% of patients for whom it was indicated. CONCLUSIONS: NHs' overall adherence to PU prevention guidelines is relatively low and is characterized by large variations between homes in adherence to many recommendations. The low level of adherence and high level of variation to many best-care practices for PU prevention indicate a continued need for quality improvement, particularly for some guidelines.

Adult↗

PubMed2003

Quality improvement implementation in the nursing home.

OBJECTIVE: To examine quality improvement (QI) implementation in nursing homes, its association with organizational culture, and its effects on pressure ulcer care. DATA SOURCES/STUDY SETTING: Primary data were collected from staff at 35 nursing homes maintained by the Department of Veterans Affairs (VA) on measures related to QI implementation and organizational culture. These data were combined with information obtained from abstractions of medical records and analyses of an existing database. STUDY DESIGN: A cross-sectional analysis of the association among the different measures was performed. DATA COLLECTION/EXTRACTION METHODS: Completed surveys containing information on QI implementation, organizational culture, employee satisfaction, and perceived adoption of guidelines were obtained from 1,065 nursing home staff. Adherence to best practices related to pressure ulcer prevention was abstracted from medical records. Risk-adjusted rates of pressure ulcer development were calculated from an administrative database. PRINCIPAL FINDINGS: Nursing homes differed significantly (p<.001) in their extent of QI implementation with scores on this 1 to 5 scale ranging from 2.98 to 4.08. Quality improvement implementation was greater in those nursing homes with an organizational culture that emphasizes innovation and teamwork. Employees of nursing homes with a greater degree of QI implementation were more satisfied with their jobs (a 1-point increase in QI score was associated with a 0.83 increase on the 5-point satisfaction scale, p<.001) and were more likely to report adoption of pressure ulcer clinical guidelines (a 1-point increase in QI score was associated with a 28 percent increase in number of staff reporting adoption, p<.001). No significant association was found, though, between QI implementation and either adherence to guideline recommendations as abstracted from records or the rate of pressure ulcer development. CONCLUSIONS: Quality improvement implementation is most likely to be successful in those VA nursing homes with an underlying culture that promotes innovation. While QI implementation may result in staff who are more satisfied with their jobs and who believe they are providing better care, associations with improved care are uncertain.

Aged↗

PubMed2002

Improving recognition of drug interactions: benefits and barriers to using automated drug alerts.

BACKGROUND: Clinicians' perceptions about decision support systems may impact the effectiveness of these technologies. OBJECTIVE: To explore clinicians' baseline knowledge of common drug interactions and experiences with automated drug alerts within a provider order entry system as a means to better understand the potential benefits and barriers to using this technology. RESEARCH DESIGN: Cross-sectional survey. SUBJECTS: The study population comprised 263 clinicians practicing within a Southern California Veterans Affairs health care system that used VA's Computerized Patient Record System (CPRS). Response rate was 64%. MEASURES: A 67-item survey (19 questions) was developed to elicit information including: (1) computer use for patient-related activities; (2) recognition of drug interactions; and (3) benefits and barriers to using automated drug alerts. RESULTS: Clinicians correctly categorized 44% (range 11-64%) of all drug-drug pairs, 53% of interacting combinations, and 54% of contraindicated pairs. Providers also correctly categorized 55% (range 24-87%) of 11 drug-disease pairs and 62% of interacting combinations, and 53% of contraindicated pairs. Nearly 90% of clinicians thought drug alerts would be helpful to identify interactions yet 55% of clinicians perceived that the most significant barrier to utilizing existing alerts was poor signal to noise ratio, meaning too many nonrelevant warnings. CONCLUSIONS: Automated drug interaction alerts have the potential to dramatically increase clinicians' recognition of selected drug interactions. However, perceived poor specificity of drug alerts may be an important obstacle to efficient utilization of information and may impede the ability of such alerts to improve patient safety.

Attitude of Health Personnel↗

PubMedDate not supplied

VA emergency health care for women: condition--critical or stable?

BACKGROUND: Veteran's Affairs (VA) facilities have reconfigured themselves to address the health care needs of the growing number of women veterans. However, the challenge of providing comprehensive care to a group that is an extreme minority within VA may still leave gaps in the delivery of necessary health care services. OBJECTIVES AND METHODS: We sought to assess the availability of women's health care specialists for emergency gynecologic problems (emergency-GYN) and for emergency mental health conditions specific to women (emergency-WMH), we surveyed the Chief of Staff and senior clinician at each VA site serving 400 or more women veterans. RESULTS: Emergency-GYN expertise was usually available at all times for 39.8% of sites, and only during usual clinic hours for 24.6% of sites. An emergency-WMH specialist was available at all times for 51.7% of sites, and only during usual clinic hours for 31.0% of sites. VA sites that had a separate women's health clinic were more likely to have emergency-GYN expertise available. Sites in regions with higher managed care penetration were less likely to have emergency-WMH specialist availability. CONCLUSIONS: Our data suggest a limited availability of specialists for gynecologic and women's mental health emergencies at some VA sites. How this may affect overall quality of care for women in the VA system is unknown. Further work is needed to determine actions clinicians take when expertise is emergently needed for health care issues unique to women. Options for expanding VA availability of such expertise include internal development of women's health expertise and telemedicine access to experts to aid in emergency women's health care decision making.

Emergency Service, Hospital↗

PubMedDate not supplied

Availability of comprehensive women's health care through Department of Veterans Affairs Medical Center.

Despite increased numbers of women veterans, little is known about health services delivery to women across the Department of Veterans Affairs (VA). To assess VA availability of women's health services, we surveyed the senior clinician at each VA site serving 400 or more women veterans. We found that virtually all sites have developed arrangements, either directly or through off-site contracts, to ensure availability of comprehensive women's health care. On-site care, however, is routinely available only for basic services. Future work should evaluate cost and quality trade-offs between using non-VA sites to increase specialized service availability and using VA sites to enhance continuity of care.

Ambulatory Care↗