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PubMed1997

Towards a component driven infrastructure for integrated healthcare systems.

A high level summarised description of the distributed clinical information system implemented in the hospital of the free university of Brussels (AZ-VUB) is described. It evolves towards a component based clinical distributed system that consists of a set of co-operating middelware software components running on a number of computers connected by a network that will foster the integration of applications, data servers and other resources in the medical field. This system is implemented in the University Hospital of Brussels (AZ-VUB) a full-service 800-bed university hospital that provides care for 23,000 inpatients, supports over 300,000 outpatient visits and receives 32,000 emergency patients a year.

Belgium↗
PubMed1994

The patient care component: patient-centered horizontal integration in a vertical world.

This paper describes the structure and operational properties of the Patient Care Component, a patient care data system developed by the Indian Health Service to support primary care in a multi-site, decentralized, health care organization. Sharing the same technology base as the Department of Veterans Affairs Distributed Hospital Computer Program, the system requires a minimal level of investment in technology compared to alternative approaches and is in operation at 140 sites. The Indian Health Service and historical aspects of the system are described briefly; the paper focuses on the design objectives for the system and lessons learned from development and several years of operational experience.

Humans↗
PubMed2000

[Internet technology for clinical applications in a digital radiography department].

PROBLEM: To provide an overview and to assess the clinical feasibility of Internet technology-based systems for hospital-wide image and report distribution as well as for video conferencing. METHODS: The paper describes the theoretical concept behind, the various technical approaches and the experience gained from different systems. RESULTS: Image and report distribution: Advantages include the universal availability of images and reports inside and outside hospitals; ease of use; security features; image and report integration; cost savings by reducing support and training efforts and by optimising available hardware. The main critical issues are performance and workflow integration with RIS and PACS. Video conferencing: main advantages are the standardised, software-based approach and the low investments for hard- and software. Depending on the desired usage the communication performance can be seen as inappropriate. CONCLUSION: Today, Internet technology-based systems appear to satisfy the main clinical needs in radiology. The mentioned drawbacks could be eliminated by means of modified software implementation and focused standardisation efforts. Considering the numerous advantages of these systems a further distribution can be expected for the future.

Communication↗
PubMed2003

Medication errors in hospitals: computerized unit dose drug dispensing system versus ward stock distribution system.

AIM: The aim of this study was to evaluate the rates and types of drug prescription and administration errors in one pediatric nephrology ward, comparing two dispensing schemes: the first one defined as handwritten prescription plus ward stock distribution system (WSDS), and the second one as computerized prescription plus unit dose drug dispensing system (UDDDS). METHOD: Data were collected over an 8-week period, from 1 February to 31 March 1999. Two fifth-year pharmacy students photocopied prescription and administration documents on the ward each day, under the supervision of a senior pharmacist. The medical record analysis was used to compare the prescription with the administration report. Prescribing and administration medication errors were classified according to the American Society of Health-System Pharmacists. RESULTS: Prescribing errors: overall, for both dispensing schemes, a total of 511 prescriptions, resulting in 4532 prescribed drugs (an average of 9 drugs per prescription) were prescribed. The total prescription error rate was 20.7% (937 of 4532), resulting in 1.9 errors per patient per day. The computerized prescription error rate was 10.6% (419 of 3943), the handwritten prescription error rate was 87.9% (518 of 589). This difference was very significant (P < 0.0001). ADMINISTRATION ERRORS: The total opportunity of administration errors was 4589 (sum of administered and omitted drugs). The total administration error rate was 23.5% (1077 of 4589) including wrong administration time, and 11.7% (538 of 4589) excluding administration time. The administration error rate, including administration associated with time errors, was only 22.5% (888 of 3943) for computerized prescription + UDDDS, compared with 29.3% (189 of 646) for handwritten prescriptions plus WSDS (P < 0.001). Excluding administration associated with time errors, the administration error rates were 9.7% and 24.3%, respectively (P < 0.0001). CONCLUSION: The drug prescription and administration error rates were significantly decreased using computerized prescription plus UDDDS as compared with handwritten prescription plus WSDS in a pediatric unit (even with potential biases taken into account).

Child↗
PubMed1993

Isolation of Salmonella enteritidis from cook-chill food distributed to hospital patients.

Cook-chill systems are increasingly being used in the UK as a convenient means of catering for hospitalized patients. When such a system is operational, it is recommended that sampling of food be performed prior to regeneration. At our hospital we have established a food hygiene laboratory to achieve this. On routine sampling of nut roast prepared by the cook-chill method, Salmonella enteritidis was isolated. It was subsequently established that raw egg had been used in the preparation of the food which had been fried. Our investigation thus exposed potentially dangerous practices in the production line and highlights the need for constant vigilance where the system is used to provide food for a relatively high risk population group.

Eggs↗
PubMed1988

ASHP national survey of hospital pharmaceutical services--1987.

The results of a fall 1987 national mail survey of pharmaceutical services in short-term hospitals are reported and compared with similar surveys conducted in 1975, 1978, 1982, and 1985. A sample of 875 hospitals was selected randomly from among the estimated 5600 U.S. short-term hospitals that employ a pharmacist on at least a part-time basis. The survey had a 71.1% response rate (617 usable replies). Nearly three-fourths of the respondents had complete unit dose drug distribution services (UDD), 68% reported complete i.v. admixture services (IVA), and 57% reported both complete UDD and complete IVA. Nearly 5% of respondents offered five specified clinical services (up from 1.8% in 1985); 24% reported having no clinical services (versus 38% in 1985). Nineteen percent said their departments had one or more clinical specialists. Overall, about one-third of pharmacy technicians had completed formal training. The number of respondents with programs to contain drug costs increased about 10% since 1985. Weekly hours of pharmacy operation averaged 102; 36.7% of respondents had pharmacy service around the clock. The percentage of hospitals with computerized drug distribution systems increased from 32% in 1985 to 52% in 1987. Prime vendors were used by 94.6% of respondents, and only 2% reported that they did not use a purchasing group. National expenditures for drugs and fluids for community hospitals were projected at $4.7 billion, personnel costs at $1.8 billion, and other pharmacy expenditures at $0.4 billion. The projected numbers of open positions nationally for pharmacists in community hospitals was 1950. The survey also collected data on the use of personal computers, inventory turnover, quality assurance, continuing-education philosophy, revenue-generating programs, and outpatient services. Drug control in community hospitals is improving, and clinical services are more widespread. Twenty percent of respondents had comprehensive pharmaceutical services, defined as complete UDD and complete IVA plus three or more clinical services.

Computers↗
PubMed2001

Use of HL7 to integrate a HIS-subsystem: limits and possibilities.

Modern computer-based hospital information systems are mostly distributed with several heterogeneous subsystems connected together by specialized communication services. The common standard to integrate subsystems is HL7. By the example of subsystem integration for a pulmonary function test lab, we discuss the possibilities of HL7, the limits we encountered and how we overcame these.

Computer Communication Networks↗
PubMed1983

Local area networks and the hospital.

Hospital information systems are characterized by their complexity of individual functions, heterogeneity of functions, and dependence upon integration. A distributed computerized information system is well suited to meeting the needs of hospitals. A local area communications network (LACN) removes a major impediment to the use of distributed systems. An advanced microprocessor-based LACN using fiberoptic communications has been developed by the Applied Physics Laboratory of The Johns Hopkins University and has been implemented at the University of California, San Francisco Hospital.

California↗
PubMed2005

Legionella waterline colonization: detection of Legionella species in domestic, hotel and hospital hot water systems.

AIMS: An evaluation was made of the prevalence of Legionella species in hot water distribution systems in the city of Bologna (Italy) and their possible association with bacterial contamination (total counts and Pseudomonadaceae) and the chemical characteristics of the water (pH, Ca, Mg, Fe, Mn, Cu, Zn and Total Organic Carbon, TOC). METHODS AND RESULTS: A total of 137 hot water samples were analysed: 59 from the same number of private apartments, 46 from 11 hotels and 32 from five hospitals, all using the same water supply. Legionella species were detected in 40.0% of the distribution systems, L. pneumophila in 33.3%. The highest colonization was found in the hot water systems of hospitals (93.7% of samples positive for L. pneumophila, geometric mean: 2.4 x 10(3) CFU l(-1)), followed by the hotels (60.9%, geometric mean: 127.3 CFU l(-1)) and the apartments with centralized heating (41.9%, geometric mean: 30.5 CFU l(-1)). The apartments with independent heating systems showed a lower level of colonization (3.6% for Legionella species), with no evidence of L. pneumophila. Correlation analysis suggests that copper exerts an inhibiting action, while the TOC tends to favour the development of L. pneumophila. No statistically significant association was seen with Pseudomonadaceae, which were found at lower water temperatures than legionellae and in individual distribution points rather than in the whole network. CONCLUSIONS: The water recirculation system used by centralized boilers enhances the spreading of legionellae throughout the whole network, both in terms of the number of colonized sites and in terms of CFU count. SIGNIFICANCE AND IMPACT OF THE STUDY: Differences in Legionella colonization between types of buildings are not due to a variation in water supply but to other factors. Besides the importance of water recirculation, the study demonstrates the inhibiting action of copper and the favourable action of TOC on the development of L. pneumophila.

Environmental Monitoring↗
PubMed1988

Economic consequences of two drug-use control systems in a teaching hospital.

Length of stay (LOS), total cost per admission (TCA), and pharmacy cost per admission (DCA) were determined for two drug-use control systems in a 1058-bed university hospital; a centralized unit dose drug distribution system served as a control. The two study systems were (1) pharmacist monitoring of drug therapy in the patient-care area and (2) centralized pharmacist monitoring of computerized patient profiles. LOS data were collected retrospectively for 659 patients admitted during a seven-month control interval. LOS, TCA, and DCA data were collected prospectively for 496 patients admitted during a five-month experimental interval. Each study system was assigned to one of three teams making rounds among intact patient groups. LOS differences were compared between intervals and by month. After corrections were made for differences in patient mix, the drug-use control system in which pharmacists were assigned to the patient-care area yielded a 1.5-day-shorter average LOS, $1293 lower average TCA (p less than 0.05), and $155 lower average DCA than under the unit dose system. The drug-use control system in which pharmacists were assigned to monitor patients' drug therapy from a central location was associated with a 0.13-day-shorter average LOS, $235 lower average TCA, and $55.13 lower average DCA than under the unit dose system. No systematic differences between teams, other than drug-use control system, appeared to explain the differences in LOS, TCA, and DCA. A drug-use control system based in a patient-care area, overseen by clinically experienced pharmacists, may result in shorter LOSs and lower total costs than centralized systems for general-medical inpatients of teaching hospitals.

Contraceptives, Oral, Combined↗
PubMed1996

Estimation of the size of the media necessary to construct a medical image database.

To estimate the size of the media necessary to construct a medical image database, a statistical analysis was made of the radiological data in our hospital information system database. The distribution of the total radiological image data storage required during one working day can be regarded as a normal distribution, and the distribution per patient was different from a normal one. Therefore, the mean amount required for the data storage of radiological images during one working day is very useful in estimating the data storage required for radiological images during a given number of working days.

Computer Systems↗
PubMedDate not supplied

[Cysticercosis' admissions in public health hospitals: Ceará State distribuition].

The geographic distribution of case registered in the System of Hospital Information of Ceará (1996-2004) and its relation with flock swine and availability of computerized tomography scan in patients' residence city, from those were studied. 424 Patients were admitted with cysticercosis (neurocysticercosis 98.3%) originating from 75 cities. No relation existed between computerized tomography in city of residence or swine flocks and cysticercosis prevelance.

Adolescent↗
PubMed2006

Influence of amoebae and physical and chemical characteristics of water on presence and proliferation of Legionella species in hospital water systems.

The reservoir for hospital-acquired Legionnaires' disease has been shown to be the potable water distribution system. The objectives of the present study were as follows: (1) to examine the possible relationship between physical-chemical characteristics of water such as temperature, pH, hardness, conductivity, and residual chlorine and the presence of amoebae as growth-promoting factors for Legionella species and (2) to determine eradication measures for water distribution systems to seek ways of reducing the risk of legionellosis. Ten hospitals in southwest France took part in this study. Water samples were collected from 106 hot water faucets, showers, hot water tanks, and cooling towers. Two analyses were performed to analyze the association between water characteristics and (1) the presence of Legionella species and (2) the proliferation of Legionella species. Of the 106 water samples examined, 67 (63.2%) were positive for Legionella species. Amoebae were detected in 73 of 106 (68.9%) samples and in 56 of 67 (86.6%) Legionella species-positive samples (P < 10(-6)). In these positive samples, conductivity was lower than 500 microOmega(-1).cm(-1) in 58.2% (P = .026), temperature was below 50 degrees C in 80.6% (P = .004), and hardness was significantly higher (P = 002) than in Legionella species-negative samples. Neither Legionella species nor amoebae were isolated from any sampling point in which the water temperature was above 58.8 degrees C. Multivariate analysis shows that high hardness and presence of amoebae were strongly correlated statistically with the presence of Legionella when showers, tanks, pH, and temperature promoted their proliferation. This study shows the importance of water quality evaluation in assessing environmental risk factors and in selecting the most appropriate prevention and control measures in hospital water systems.

Amoeba↗
PubMed1997

Colonization of transplant unit water supplies with Legionella and protozoa: precautions required to reduce the risk of legionellosis.

Organ transplant recipients and other immunosuppressed patients are known to be at increased risk of nosocomial Legionnaires' disease. Although the ecology of Legionella in hospital water storage and distribution systems (including a protozoonotic relationship with free-living protozoa) has been well documented, little is known regarding the quality of water supplied to high-risk units. Hot- and cold-water samples (two first draw and one run to waste for 5 min) were taken from 69 (85%) of the 81 United Kingdom organ transplant units (31 renal, 24 bone marrow, nine cardiopulmonary and five liver transplant units) and cultured for Legionella and protozoa. Legionella spp. were isolated from the water supplies of 38 (55%) units and Legionella pneumophila from 31 (45%). The blue-white fluorescent group of Legionella (Legionella gormanii, Legionella bozemanii and others) was isolated from 18 (26%) units. Free-living protozoa were isolated from 47 units (68%) and genera of the protozoa known to permit the intracellular growth of Legionella (PGIGL), from 40 units (58%). Possible associations between Legionella and the variables Protozoa; PGIGL; water pH; and circulating water temperature (recorded after running to waste for 5 min) were examined by logistic regression analysis. In cold-water supplies, a significant association was found between the isolation of Legionella and PGIGL (P = 0.032; OR = 1.81; 95% CI 1.1-3.1). In hot-water supplies, an inverse association was found between the isolation of Legionella and circulating water temperature (P = 0.034; OR = 1.0719 per degree C; 95% CI 1.0052-1.1432). (We failed to isolate Legionella when the circulating hot water was > 58 degrees C. No other associations were significant. We recommend the active surveillance of water quality in high-risk patient areas, and that transplant units, either with a history of nosocomial Legionnaires' disease, or where active surveillance indicates a persistently high Legionella colony count, take remedial action. The quality of cold water may be improved by provision of a dedicated supply taken directly from the incoming mains; and of hot water by the use of a dedicated calorifier, able to maintain a minimum circulating hot water return temperature of 60 degrees C.

Cross Infection↗
PubMed1986

Paleoepidemiologic investigation of Legionnaires disease at Wadsworth Veterans Administration Hospital by using three typing methods for comparison of legionellae from clinical and environmental sources.

Multilocus enzyme electrophoresis, monoclonal antibody typing for Legionella pneumophila serogroup 1, and plasmid analysis were used to type 89 L. pneumophila strains isolated from nosocomial cases of Legionnaires disease at the Veterans Administration Wadsworth Medical Center (VAWMC) and from the hospital environment. Twelve L. pneumophila clinical isolates, obtained from patients at non-VAWMC hospitals, were also typed by the same methods to determine typing specificity. Seventy-nine percent of 33 VAWMC L. pneumophila serogroup 1 clinical isolates and 70% of 23 environmental isolates were found in only one of the five monoclonal subgroups. Similar clustering was found for the other two typing methods, with excellent correlation between all methods. Enzyme electrophoretic typing divided the isolates into the greatest number of distinct groups, resulting in the identification of 10 different L. pneumophila types and 5 types not belonging to L. pneumophila, which probably constitute an undescribed Legionella species; 7 clinical and 34 environmental VAWMC isolates and 2 non-VAWMC clinical isolates were found to be members of the new species. Twelve different plasmid patterns were found; 95% of VAWMC clinical isolates contained plasmids. Major VAWMC epidemic-bacterial types were common in the hospital potable-water distribution system and cooling towers. Strains of L. pneumophila which persisted after disinfection of contaminated environmental sites were of a different type from the prechlorination strains. All three typing methods were useful in the epidemiologic analysis of the VAWMC outbreak.

Antibodies, Monoclonal↗
PubMed1983

Effect of decentralized computer order entry on medication turnaround time.

The medication order turnaround times of two drug-distribution systems in the same hospital using either centralized or decentralized computer order entry were compared. A decentralized medication order entry satellite pharmacy equipped with a pharmacy computer terminal and a small supply of medications typically requested to be administered without delay was implemented on one floor of a 518-bed hospital. Pharmacist-verified medication orders for five of the hospital's 22 nursing units were entered into the satellite computer terminal and transmitted to the central pharmacy for processing. Initial doses of medication dispensed from the satellite's drug supply were noted in the central pharmacy. Pharmacy personnel recorded time they spent in various steps of the medication delivery cycle for routine medication orders handled by the decentralized pharmacy. The same measurements were made for the centralized pharmacy system before implementation of the pharmacy satellite. The mean turnaround time for routine medication orders in the decentralized system was 79.5 minutes, which was 52% less than that of the centralized system (167.3 minutes). Decentralized computer order entry appears to be an effective way of decreasing turnaround time for routine medication orders.

Computers↗
PubMed1984

Consultant evaluation of a hospital medication system: analysis of the existing system.

A consultant team's evaluation of a system for distributing and controlling medications in a large teaching hospital is described. Through interviews with key personnel from administration, pharmacy, nursing, and the medical staff, an interdisciplinary research group identified problems in the reliability and response times of the hospital's existing medication system. After assessing staff expectations regarding acceptable standards for medication errors and response times and their attitudes toward proposed changes in the medication system, medication-error rates were determined using a pharmacist-observer method. Observations during 34 five-hour periods on four nursing units were conducted over a 17-day period. Medication-error rates were calculated as the frequency of medication errors during the observation period divided by the total opportunities for error (OE), which were defined as doses ordered plus unauthorized doses given. Response times for processing "now," "stat," and routine orders were also determined using work-sampling methods. The total medication-error rate for the nursing units studied was 9% excluding wrong-time errors; more than a third of doses were given more than 30 minutes before or after their scheduled administration times. Response times for "now" and "stat" orders averaged about 23 minutes, in conformance with the desired standard of 30 minutes. However, processing of routine orders required an average of two hours and seven minutes, much of which was attributed to delays in the messenger service. The basic design of the existing unit dose medication system contributed to problems in the reliability and efficiency of the system.

Attitude of Health Personnel↗