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Biomedical subjects

Anna Miller

Publications and source records attributed to Anna Miller.

12 recordsLinked to original sources
PubMed2006

Diagnosis of pediatric human immunodeficiency virus infection in resource-constrained settings.

The majority of children infected with human immunodeficiency virus live in resource-constrained settings and die without an established diagnosis. Definitive laboratory diagnosis in children younger than 12-18 months requires virologic testing; however, antibody testing is often the only option available. Antibody testing provides a definitive diagnosis in older children but is frequently not used. Children meeting clinical criteria should be treated regardless of availability of laboratory diagnoses.

AIDS Serodiagnosis↗
PubMed2005

Devastating injuries in healthcare workers: description of the crisis and legislative solution to the epidemic of back injury from patient lifting.

The purpose of this report is to describe a crisis in healthcare, disabling back injuries in US healthcare workers. In addition, outlined is the proven solution of safe, mechanized, patient lifting, which has been shown to prevent these injuries. A "Safe Patient Handling--No Manual Lift" policy must be immediately instituted throughout this country. Such a policy is essential to halt hazardous manual patient lifting, which promotes needless disability and loss of healthcare workers, pain and risk of severe injury to patients, and tremendous waste of financial resources to employers and workers' compensation insurance carriers. Healthcare workers consistently rank among top occupations with disabling back injuries, primarily from manually lifting patients. Back injury may be the single largest contributor to the nursing shortage. Reported injuries to certified nursing assistants are three to four times that of registered nurses. A national healthcare policy for "Safe Patient Handling--No Manual Lift" is urgently needed to address this crisis. Body mechanics training is ineffective in prevention of back injury with patient lifting. Mandated use of mechanical patient lift equipment has proven to prevent most back injury to nursing personnel and reduce pain and injury to patients associated with manual lifting. With the national epidemic of morbid obesity in our country, innovative devices are available for use in emergency medical systems and hospitals for patient lifting and transfer without injury to hospital personnel. The US healthcare industry has not voluntarily taken measures necessary to reduce patient handling injury by use of mechanical lift devices. US healthcare workers who suffer disabling work-related back injuries are limited to the fixed, and often inadequate, relief which they may obtain from workers' compensation. Under workers' compensation law, healthcare workers injured lifting patients may not sue their employer for not providing mechanical lift equipment. Discarding healthcare workers disabled by preventable back injuries is an abuse which legislators must remedy. In addition, Medicare reimbursement policies must also be updated to allow the disabled community to purchase electrically operated overhead ceiling lifts. The US lags far behind countries with legislated manual handling regulations and "No Lifting" nursing policies. England and Australia have had "No Lifting" nursing policies in place since 1996 and 1998, respectively. The National Occupational Research Agenda (NORA) recognized a model in 2003 for reduction of back injuries to nursing staff in US healthcare facilities. Also in 2003, the American Nurses Association called for elimination of manual patient handling because it is unsafe and causes musculoskeletal injuries to nurses. The first state legislation for safe patient handling passed both houses in California but was vetoed by the Governor in September 2004. California and other states are preparing to (re)introduce legislation in January 2005. A national, industry-specific policy is essential to quell the outflow of nursing personnel to disability from manual patient lifting.

Adult↗
PubMed2004

Prevention of mother to child transmission of HIV: evaluation of a pilot programme in a district hospital in rural Zimbabwe.

PROBLEM: Zimbabwe has one of the highest rates of HIV seroprevalence in the world. In 2001 only 4% of women and children in need of services for prevention of mother to child transmission of HIV were receiving them. DESIGN: Pilot implementation of the first programme for prevention of mother to child transmission of HIV in rural Zimbabwe. SETTING: 120 bed district hospital in Buhera district (285,000 inhabitants), Manicaland, Zimbabwe. KEY MEASURES FOR IMPROVEMENT: Programme uptake indicators monitored for 18 months; impact of policy evaluated by assessing up-scaling of programme. STRATEGIES FOR CHANGE: Voluntary counselling and testing services for HIV were provided in the hospital antenatal clinic. Women identified as HIV positive and informed of their serostatus and their newborn were offered a single dose antiretroviral treatment of nevirapine; mother-child pairs were followed up through routine health services. Nursing staff and social workers were trained, and community mobilisation was conducted. EFFECTS OF CHANGE: No services for prevention of mother to child transmission of HIV were available at baseline. Within 18 months, 2298 pregnant women had received pretest counselling, and the acceptance of HIV testing reached 93.0%. Of all 2137 women who had an HIV test, 1588 (74.3%) returned to collect their result; 326 of the 437 HIV positive women diagnosed had post-test counselling, and 104 (24%) mother-child pairs received nevirapine prophylaxis. LESSONS LEARNT: Minimum staffing, an enhanced training programme, and involvement of district health authorities are needed for the implementation and successful integration of services for prevention of mother to child transmission of HIV. Voluntary counselling and testing services are important entry points for HIV prevention and care and for referral to community networks and medical HIV care services. A district approach is critical to extend programmes for prevention of mother to child transmission of HIV in rural settings. The lessons learnt from this pilot programme have contributed to the design of the national expansion strategy for prevention of mother to child transmission of HIV in Zimbabwe.

Ambulatory Care↗
PubMed2004

Platelet surface glutathione reductase-like activity.

We previously found that reduced glutathione (GSH) or a mixture of GSH/glutathione disulfide (GSSG) potentiated platelet aggregation. We here report that GSSG, when added to platelets alone, also potentiates platelet aggregation. Most of the GSSG was converted to GSH by a flavoprotein-dependent platelet surface mechanism. This provided an appropriate redox potential for platelet activation. The addition of GSSG to platelets generated sulfhydryls in the beta subunit of the alpha(IIb)beta(3) fibrinogen receptor, suggesting a mechanism for facilitation of agonist-induced platelet activation.

Blood Platelets↗
PubMed2004

Expression of DNA-dependent protein kinase in human granulocytes.

Human polymorphonuclear leukocytes (PMN) have been reported to completely lack of DNA-dependent protein kinase (DNA-PK) which is composed of Ku protein and the catalytic subunit DNA-PKcs, needed for nonhomologous end-joining (NHEJ) of DNA double-strand breaks. Promyelocytic HL-60 cells express a variant form of Ku resulting in enhanced radiation sensitivity. This raises the question if low efficiency of NHEJ, instrumental for the cellular repair of oxidative damage, is a normal characteristic of myeloid differentiation. Here we confirmed the complete lack of DNA-PK in PMN protein extracts, and the expression of the truncated Ku86 variant form in HL-60. However, this degradation of DNA-PK was shown to be due to a DNA-PK-degrading protease in PMN and HL-60. In addition, by using a protease-resistant whole cell assay, both Ku86 and DNA-PKcs could be demonstrated in PMN, suggesting the previously reported absence in PMN of DNA-PK to be an artefact. The levels of Ku86 and DNA-PKcs were much reduced in PMN, as compared with that of the lymphocytes, whereas HL-60 displayed a markedly elevated DNA-PK concentration. In conclusion, our findings provide evidence of reduced, not depleted expression of DNA-PK during the mature stages of myeloid differentiation.

Antigens, Nuclear↗
PubMed2004

Implementing a rural programme of prevention of mother-to-child transmission of HIV in Zimbabwe: first 18 months of experience.

OBJECTIVE: To report on activities and lessons learned during the first 18 months of a rural programme of prevention of mother-to-child transmission of HIV (PMTCT) in Zimbabwe. METHODS: The PMTCT services were introduced in Murambinda Mission Hospital (120 beds), Buhera, in 2001. Programme strategies consisted in recruiting counselling staff, training health professionals, improving mother-child health (MCH) facilities and conducting information, education and communication activities within the community to address HIV/AIDS awareness and stigma. The following components were implemented within MCH services: voluntary counselling and testing of HIV using rapid testing, nevirapine short regimen proposed to all HIV-infected mothers identified and their newborns, support to exclusive breastfeeding for 6- and 18-month mother-child follow-up. Routine monitoring data collected from August 2001 to February 2003 were used to estimate programme uptake. RESULTS: Of 2471 pregnant women using antenatal services, 2298 were pre-test counselled, the acceptance of HIV testing reached 92.9%. Of the women who decided to take an HIV test, 1588 (74.3%) returned to collect their result. Overall HIV prevalence was 20.4% (n = 437); 326 of the HIV-positive women were counselled and 104 (24%) received complete mother-child antiretroviral prophylaxis. CONCLUSIONS: Acceptability of HIV testing after counselling has remained above 90% since the onset of the programme. Collection of test results and mother-child follow-up are among the most challenging activities of the programme. A district approach and community participation are critical to develop PMTCT programmes in rural settings, even with reasonably good MCH services.

Adolescent↗
PubMed2003

Effects of plant-based diets high in raw or roasted almonds, or roasted almond butter on serum lipoproteins in humans.

OBJECTIVE: To compare the lipid-altering effect of roasted salted almonds and roasted almond butter with that of raw almonds, as part of a plant-based diet. METHODS: Thirty-eight free-living, hypercholesterolemic men (n = 12) and women (n = 26) with a mean total serum cholesterol (TC) of 245 + 29 mg/dL (mean + SD) followed a heart-healthy diet including 100g of one of three forms of almonds: roasted salted almonds, roasted almond butter or raw almonds for four weeks. Measurements of serum TC, triglycerides (TG), selected lipoproteins and blood pressure were taken at baseline and after four weeks. RESULTS: All three forms of almonds in the context of a heart-healthy diet significantly lowered low-density lipoprotein-cholesterol (LDL) from baseline to the completion of the study. Both raw and roasted almonds significantly lowered TC, whereas the decrease by almond butter (in a smaller cohort) did not reach statistical significance. High-density lipoprotein-cholesterol (HDL) did not significantly change with raw or roasted almonds but slightly increased with almond butter. At the end of the study, blood pressure did not change significantly from baseline values for any of the groups. CONCLUSION: These results suggest that unblanched almonds-whether raw, dry roasted, or in roasted butter form-can play an effective role in cholesterol-lowering, plant-based diets.

Adult↗
PubMed2002

Flexible endoscopy in the management of patients undergoing Roux-en-Y gastric bypass.

BACKGROUND: Flexible upper endoscopy (FUE) is an important diagnostic and therapeutic tool in the management of upper gastrointestinal diseases. We examined the role of FUE in the management of patients undergoing Roux-en-Y gastric bypass (RYGBP). METHODS: All patients undergoing RYGBP at a single institution from 1986 to 2001 were studied. Preoperative FUE was performed by the surgeon to assess the anatomy of the esophagus, stomach, and duodenum. Since 1997, gastric biopsies were obtained, testing for the presence of H. pylori. Colonized patients were treated preoperatively. Postoperatively, FUE was performed by the surgeon as indicated clinically, for management of symptoms suggesting anastomotic stenosis, upper gastrointestinal bleeding, inflammation, or ulcers. Endoscopic balloon dilatation was performed as indicated. RESULTS: 560 patients underwent RYGBP during the study period. Of these, 536 underwent preoperative FUE. Endoscopic findings changed or altered the operative procedure in 26 patients (4.9%). Preoperative testing for H. pylori was performed on 206 patients, of whom 62 (30.1%) were positive. Patients tested for H. pylori had a lower incidence of postoperative marginal ulcers (n = 5, 2.4%) than did patients who did not undergo such screening (n = 354, 6.8%, P < 0.05). Postoperatively, 54 patients underwent 80 endoscopic balloon dilatations for stenosis of the gastrojejunostomy. In addition, 18 patients underwent 28 FUEs that proved negative for such stenosis. In addition, 64 patients underwent 88 additional diagnostic or therapeutic FUEs in the postoperative period, including investigation of symptoms of pain, bleeding, persistent vomiting, or weight regain. CONCLUSION: Upper endoscopy is a tool which may be used by the surgeon in the preoperative and postoperative management of patients undergoing RYGBP to modify therapy, improve outcomes, and diagnose and treat postoperative complications.

Anastomosis, Roux-en-Y↗
PubMed2002

Functional cloning using pFB retroviral cDNA expression libraries.

Retroviral cDNA expression libraries allow the efficient introduction of complex cDNA libraries into virtually any mitotic cell type for screening based on gene function. The cDNA copy number per cell can be easily controlled by adjusting the multiplicity of infection, thus cell populations may be generated in which >90% of infected cells contain one to three cDNAs. We describe the isolation of two known oncogenes and one cell-surface receptor from a human Burkitt's lymphoma (Daudi) cDNA library inserted into the high-titer retroviral vector pFB.

3T3 Cells↗
PubMedDate not supplied

Psychosocial evaluation of bariatric surgery candidates: a survey of present practices.

OBJECTIVE: Successful outcome for bariatric surgery is largely dependent on patients' ability to adhere to postoperative behavior changes. A thorough psychological evaluation is often required before patients' approval for surgery. In addition to a standard psychiatric interview, assessment of behavioral components specific to this surgery seems indicated. No uniform guidelines exist on how to conduct such an evaluation. This survey was designed to collect information on the level of involvement of mental health professionals with bariatric surgery programs and their approach to evaluating bariatric surgery candidates. METHODS: Surveys about psychological evaluation practices were mailed to 188 bariatric surgery programs. Eighty-one surveys were returned. RESULTS: Eighty-eight percent of programs require patients to undergo a psychological evaluation and almost half require formal standardized psychological assessment. Current illicit drug use, active symptoms of schizophrenia, severe mental retardation, and lack of knowledge about the surgery were the most commonly cited contraindications, preventing patients from gaining approval for surgery. DISCUSSION: The majority of programs use psychological evaluations; however, the exclusion criteria for surgery vary greatly. Establishing uniform guidelines for the screening of bariatric surgery candidates is necessary. Suggestions on how to begin this process are provided. More research about behavioral and cognitive predictors of postsurgical success is needed.

Attitude to Health↗
PubMedDate not supplied

Laparoscopic Toupet versus Nissen fundoplication for the treatment of gastroesophageal reflux disease.

The Nissen fundoplication is the most popular laparoscopic operation performed for the surgical treatment of gastroesophageal reflux disease (GERD). However, for patients in whom esophageal peristalsis is documented to be weak preoperatively, use of a partial wrap, or Toupet procedure, has often been used as an alternative to lessen the potential for postoperative dysphagia. Recent reports have criticized the Toupet procedure as having a higher long-term failure rate than the Nissen approach, especially for patients with severe forms of GERD. We reviewed our experience performing laparoscopic antireflux surgery over a 7-year period and compared the results of patients undergoing laparoscopic Nissen versus Toupet procedures. All procedures were performed at our institution by a single surgeon. Data recorded included preoperative demographic data, preoperative disease parameters, perioperative data, postoperative course, and symptom scores. Follow-up was based on a combination of medical records and phone interviews. There were 142 patients with complete records allowing review for this study. Of these, 118 underwent 122 Nissen fundoplications and 26 underwent 27 Toupet fundoplications. Selection of the procedure was based on preoperative manometric studies. There were seven reoperations. Seven of the patients (28%) who underwent Toupet procedures had severe GERD, a percentage comparable to the Nissen group (31.6%). Preoperative parameters were comparable for both groups, although the Toupet patients had lower average preoperative LES pressures (9.79 mmHg) than did the Nissen patients (16.1 mmHg, P < 0.05). The operative duration, operative blood loss, morbidity, length of hospitalization, need for reoperation, and efficacy in terms of relieving symptoms (average follow-up = 27.5 months) were comparable for both groups. Based on this experience, the Toupet procedure seems safe and effective in treating the symptoms of GERD, including patients with severe forms of the disease. We recommend its selective use in patients with preoperative esophageal hypomotility who are undergoing laparoscopic antireflux surgery.

Adolescent↗