Effect of a Comprehensive School-Based Health Center on Academic Growth in K-8th Grade Students

OBJECTIVE

School-based health centers (SBHCs) improve health care access, but associations with educational outcomes are mixed and limited for elementary and middle school students. We investigated whether students enrolled in a comprehensive SBHC demonstrated more growth in standardized math and reading assessments over 4 school years versus nonenrolled students. We also explored changes in absenteeism.

METHODS

Participants were students enrolled in 2 co-located Title I schools from 2015-19 (1 elementary, 1 middle, n = 2480). Analysis of math and reading was limited to students with baseline and postbaseline scores (math n = 1622; reading n = 1607). Longitudinal regression models accounting for within-subject clustering were used to estimate the association of SBHC enrollment with academic scores and daily absenteeism, adjusting for grade, sex, body mass index category, health conditions, baseline outcomes (scores or absenteeism), and outcome pretrends.

RESULTS

More than 70% of SBHC-enrolled students had math (1194 [73.6%]) and reading 1186 [73.8%]) scores. Enrollees were more likely than nonenrollees to have asthma (39.7% vs 19.6%) and overweight/obesity (42.4% vs 33.6%). Adjusted baseline scores were significantly lower in math and reading for enrollees. Mean change from baseline for enrollees exceeded nonenrollees by 3.5 points (95% confidence interval [CI]: 2.2, 4.8) in math and 2.1 points (95% CI: 0.9, 3.3) in reading. The adjusted rate of decrease in daily absenteeism was 10.8% greater for enrollees (incident rate ratio 0.772 [95% CI: 0.623, 0.956]) than nonenrollees (incident rate ratio 0.865 [95% CI: 0.696, 1.076]).

CONCLUSIONS

SBHC enrollees had greater health and educational risk but demonstrated more growth in math and reading and less absenteeism than nonenrollees.

Family perspectives on provider conversations about housing needs for children with medical complexity

BACKGROUND

Children with medical complexity (CMC) have unique, and often unmet, housing needs that place them at risk for housing insecurity and poor health outcomes. Yet, little is known about how families with CMC discuss their housing needs with healthcare providers. We sought to understand: (1) how housing is currently discussed between CMC caregivers and healthcare providers, and (2) how CMC caregivers want such conversations to occur.

METHODS

From August to November 2020, we conducted semi-structured interviews with parents/guardians of CMC (<26 years old) in Maryland as part of a larger study to understand their housing experience. Four questions on communication with providers about housing were developed a priori and included in this analysis. Qualitative content analysis was applied to interview transcripts.

RESULTS

Among 31 completed interviews, most participants were female (90%), lived in single-family homes (68%) and were from a mix of neighbourhood types (urban 19%, suburban 58%, rural 22%). Their children ranged in age from 6 months to 22 years, had a mix of insurance types (public 65%, private 29%, both 6%) and nearly all required medical equipment or technology. Four themes emerged: (1) Current housing conversations are rare and superficial, (2) Ideal housing conversations would result in thoughtful care plans and concrete supports, (3) Frequency and initiation of housing conversations are best tailored to family preferences and (4) Value of housing conversations are limited by lack of provider knowledge and time.

CONCLUSIONS

Conversations about housing needs for CMC happen in limited ways with healthcare providers, despite a desire on the part of their caregivers. Such conversations can give meaningful insights into the family's specific housing challenges, allowing providers to appropriately tailor care plans and referrals. Future work is needed to capture provider perspectives, design CMC-specific housing screeners and develop interdisciplinary referral strategies.

An emotional journey: caregiver experiences with gastrostomy tube decision-making for children with cystic fibrosis

BACKGROUND

Nutritional challenges are common in early CF care and stressful for caregivers of children with CF (cwCF) to navigate. Gastrostomy tube (G-tube) placement can improve weight gain, however the decision to proceed with placement is personalized and preference-sensitive. Little is known about the experiences of caregivers of cwCF and the G-tube decision-making process.

OBJECTIVES

The present study used a qualitative approach to explore the perceptions and experiences of caregivers of cwCF with G-tube introductions and recommendations, as well as factors influencing G-tube decision-making.

METHODS

Caregivers of cwCF aged ≤ 10 years completed audio-taped, semi-structured interviews describing their experiences with G-tube placement discussions. Interviews were transcribed and two independent researchers coded the transcripts and conducted content and thematic analysis using an inductive approach.

RESULTS

Participants included 43 caregivers, 84 % were mothers (36/43). CwCF had a mean age of 4 years (SD=2.6), 84 % were White (36/43), and 60 % reported weights below <50th percentile (26/43). All caregivers knew about G-tubes, 44 % (19/43) were recommended a G-tube and 35 % (15/43) had a G-tube placed. Major findings included descriptions of the stages of G-tube decision-making from a heads up, to the game plan, to making a first difficult decision and finally living with the decision to pursue G-tube placement.

CONCLUSION

G-tube decision-making is an emotional and personalized journey for caregivers of cwCF. Efforts to explore the values and priorities of caregivers is imperative to supporting families making difficult decisions in CF care.

Racial and Ethnic Disparities in the Medical Home for Children Born Premature in the National Survey of Children's Health

OBJECTIVE

Children born premature are more likely to be from minoritized racial and ethnic groups and face chronic health and developmental problems. The medical home aims to comprehensively address health and social needs of all families. This study evaluates racial and ethnic disparities in the prevalence of a medical home among children born premature compared to children born full-term.

METHODS

A 2017-18 National Survey of Children's Health data set was used to calculate the medical home performance measure and subcomponents for children aged 0 to 17 born premature (n = 5633) or full-term (n = 45,819). Chi square and logistic regression assessed magnitude and significance of variations by race and ethnicity and prematurity status.

RESULTS

Prematurity prevalence differed by race and ethnicity (12.0% non-Hispanic Black [NHB], 12.8% Hispanic, 11.1% Multiracial/Other, 11.0% non-Hispanic White [NHW]). Minoritized children born premature had lower adjusted odds of receiving care in a medical home compared to NHW peers (eg, NHB adjusted odds ratio [aOR] 0.54 [95% confidence interval {CI}: 0.38-0.76] and Hispanic aOR 0.56 [95% CI: 0.40-0.79]). Differences were greater in magnitude among children born premature compared to full-term peers (eg, NHB premature aOR 0.54 [95% CI: 0.38-0.76] vs NHB full-term aOR 0.67 [95% CI: 0.58-0.78]), with similar results for "personal doctor/nurse" and "usual sick care."

CONCLUSIONS

Racial and ethnic disparities exist in the medical home among children born premature, some more pronounced than full-term peers. To deliver equitable care for all children, efforts are needed to expand access to and improve the medical home, including reliable routine and sick care and stronger family-provider relationships.

Development and validation of an accurate smartphone application for measuring waist-to-hip circumference ratio

Waist-to-hip circumference ratio (WHR) is now recognized as among the strongest shape biometrics linked with health outcomes, although use of this phenotypic marker remains limited due to the inaccuracies in and inconvenient nature of flexible tape measurements when made in clinical and home settings. Here we report that accurate and reliable WHR estimation in adults is possible with a smartphone application based on novel computer vision algorithms. The developed application runs a convolutional neural network model referred to as MeasureNet that predicts a person's body circumferences and WHR using front, side, and back color images. MeasureNet bridges the gap between measurements conducted by trained professionals in clinical environments, which can be inconvenient, and self-measurements performed by users at home, which can be unreliable. MeasureNet's accuracy and reliability is evaluated using 1200 participants, measured by a trained staff member. The developed smartphone application, which is a part of Amazon Halo, is a major advance in digital anthropometry, filling a long-existing gap in convenient, accurate WHR measurement capabilities.

Defining and Promoting Pediatric Pulmonary Health: Equitable Family and Community Partnerships

Optimizing pulmonary health across the lifespan begins from the earliest stages of childhood and requires a partnership between the family, pulmonologist, and pediatrician to achieve equitable outcomes. The Community Pediatrics session of the Defining and Promoting Pediatric Pulmonary Health workshop weaved together 4 community-based pillars with 4 research principles to set an agenda for future pediatric pulmonary research in optimizing lung and sleep health for children and adolescents. To address diversity, equity, and inclusion, both research proposals and workforce must purposefully include a diverse set of participants that reflects the community served, in addition to embracing nontraditional, community-based sites of care and social determinants of health. To foster inclusive, exploratory, and innovative research, studies must be centered on community priorities, with findings applied to all members of the community, particularly those in historically marginalized and minoritized groups. Research teams should also foster meaningful partnerships with community primary care and family members from study conceptualization. To achieve these goals, implementation and dissemination science should be expanded in pediatric pulmonary research, along with the development of rapid mechanisms to disseminate best practices to community-based clinicians. To build cross-disciplinary collaboration and training, community-academic partnerships, family research partnerships, and integrated research networks are necessary. With research supported by community pillars built on authentic partnerships and guided by inclusive principles, pediatric lung and sleep health can be optimized for all children and adolescents across the full lifespan in the community in which they live and thrive.

Resident Perceptions of Continuity Clinic Patient Metrics Differ From EHR Data: Pilot Use of Population Health Dashboards

BACKGROUND AND OBJECTIVES

Population health management (PHM) dashboards using electronic health record (EHR) data can teach trainees about the population they serve while also delivering data on their clinical practice. Yet, few studies have demonstrated their use. In this pilot study, we assessed baseline resident perceptions of population health metrics for continuity clinic panels by comparing resident estimates with EHR-reported values delivered by individualized PHM dashboards.

METHODS

A descriptive, comparative study was conducted at a primary continuity clinic site for pediatric residents in January 2018. Residents were surveyed about population health metrics for their patient panels, including demographics, utilization, and medical diagnoses. We compared resident estimates to corresponding EHR-reported values using 2-tailed paired t tests.

RESULTS

A total of 42 out of 55 eligible residents (76%) completed the survey. Compared with EHR-reported values, residents estimated higher percentages of emergency department utilization (22.1% vs 10.3%, P < .01) and morbidity, including medical complexity (15.6% vs 5.9%, P < .01), overweight (38.1% vs 11.7%, P < .01), obesity (20.5% vs 15.8%, P = .02), and asthma (34.6% vs 21.4%, P < .01).

CONCLUSIONS

In this pilot study of PHM dashboards, resident perceptions of continuity clinic population health metrics did not align with EHR data. Estimates were higher for measures of utilization and morbidity. PHM dashboards may help trainees better understand their patient populations and serve as a consistent source of objective practice data. However, further research and investment is needed to evaluate dashboard implementation and impact on trainee and patient outcomes.

A Pilot Study of Patient Photographs and Handoff Communication

BACKGROUND AND OBJECTIVES

Safe and effective handoffs have become a national priority. Given that patient photographs have been associated with safety benefits in other settings, we hypothesize they could improve handoff communication. Our objective was to determine whether patient photographs used during simulated handoffs improves information retention, response to clinical scenarios, and familiarity with patients, compared with simulated handoffs without photographs.

METHODS

We conducted a pilot mixed-methods study using simulated handoff sessions with pediatric residents. One investigator simulated 2 verbal handoff sessions with participants randomized to receive stock patient photographs in either the first or second session. Participants answered an online questionnaire after each session to assess information recall and familiarity with patients. Primary outcomes included percent correct responses and response time. Participants were interviewed to assess the benefits and challenges of using photographs in handoffs.

RESULTS

Forty pediatric residents participated. Correct responses and response time did not differ significantly between sessions. Participants indicated less confusion and more comfort caring for patients after photograph handoff sessions. All participants identified benefits to using patient photographs and 75% identified challenges. Benefits included assisting memory, enhancing connection with patients, and improving patient safety. Challenges included visual distraction, bias concerns, and patient privacy.

CONCLUSIONS

In this pilot study, patient photographs did not result in improved information retention or efficiency of response to clinical scenarios but were associated with perceptions of reduced confusion and enhanced comfort. Participants identified benefits and challenges of incorporating photographs in handoffs that could inform use in real-world settings.

Patient engagement strategies for adults with chronic conditions: an evidence map

BACKGROUND

Patient and family engagement (PFE) has been defined as a partnership between patients, families, and health care providers to achieve positive health care outcomes. There is evidence that PFE is critical to improving outcomes. We sought to systematically identify and map the evidence on PFE strategies for adults with chronic conditions and identify areas needing more research.

METHODS

We searched PubMed, CINAHL, EMBASE, and Cochrane, January 2015 to September 2021 for systematic reviews on strategies for engaging patients with chronic conditions and their caregivers. From each review, we abstracted search dates, number and type of studies, populations, interventions, and outcomes. PFE strategies were categorized into direct patient care, health system, and community-policy level strategies. We found few systematic reviews on strategies at the health system, and none at the community-policy level. In view of this, we also searched for original studies that focused on PFE strategies at those two levels and reviewed the PFE strategies used and study findings.

RESULTS

We found 131 reviews of direct patient care strategies, 5 reviews of health system strategies, and no reviews of community-policy strategies. Four original studies addressed PFE at the health system or community-policy levels. Most direct patient care reviews focused on self-management support (SMS) (n = 85) and shared decision-making (SDM) (n = 43). Forty-nine reviews reported positive effects, 35 reported potential benefits, 37 reported unclear benefits, and 4 reported no benefits. Health system level strategies mainly involved patients and caregivers serving on advisory councils. PFE strategies with the strongest evidence focused on SMS particularly for patients with diabetes. Many SDM reviews reported potential benefits especially for patients with cancer.

DISCUSSION

Much more evidence exists on the effects of direct patient care strategies on PFE than on the effects of health system or community-policy strategies. Most reviews indicated that direct patient care strategies had positive effects or potential benefits. A limitation of this evidence map is that due to its focus on reviews, which were plentiful, it did not capture details of individual interventions. Nevertheless, this evidence map should help to focus attention on gaps that require more research in efforts to improve PFE.

Patient and family engagement strategies for children and adolescents with chronic diseases: A review of systematic reviews

OBJECTIVE

Patient and family engagement is important for family-centered care, particularly for children and adolescents with chronic disease. We aimed to 1) identify available evidence from systematic reviews on engagement strategies used to help children, adolescents, and their caregivers manage chronic conditions, and 2) identify gaps in the literature.

METHODS

We searched PubMed and CINAHL from January 2015 to January 2020 for systematic reviews on patient and family engagement strategies in the pediatrics population (<18 years). Strategies were categorized by direct patient care, health system, and community policy levels. We excluded reviews if interventions were unidirectional or without comparison.

RESULTS

We identified 25 systematic reviews. Twenty-two evaluated direct patient care, with 14 (279 unique studies) exclusively in pediatrics and 8 (24 unique studies) that included pediatric results with adults. Three reviews (9 unique studies) evaluated health system strategies. Direct patient care reviews focused on self-management support (n = 16) and shared decisionmaking (n = 6). Asthma was the most frequently evaluated condition (n = 14).

CONCLUSIONS AND PRACTICE IMPLICATIONS

Engagement strategies for children and adolescents with chronic disease are focused on direct patient care, particularly for asthma. More research is needed to address engagement for broader populations, expanded outcomes, and at health system and community levels.

Pediatric Asthma Is Associated With Poorer 3-Year Academic Achievement in Urban Elementary and Middle-School Students

OBJECTIVE

Asthma has been associated with worse academic performance in a single school year, yet this association may be magnified over time as students with asthma continue to fall behind. This study examined the relationship between asthma and standardized test performance aggregated across 3 school years, including whether performance varied by likelihood of having significant asthma.

METHODS

Data were from students in grades K-8 at 2 urban public schools in the Northeastern United States (2015-2018). Asthma was based on parent- and self-report and school health center records. Standardized test performance was assessed using Measures of Academic Progress (MAP) and Partnership for Assessment of Readiness for College and Careers (PARCC). Mixed effects linear and logistic regression models were used to evaluate the relationship between asthma and performance during 3 school years.

RESULTS

Any asthma was associated with worse MAP performance across the 3 academic years. Students with the most significant asthma demonstrated worse performance on MAP and PARCC. Aggregating across 3 school years, students scored 3.17 points worse on MAP reading (95% confidence interval [CI]: 0.7-5.63; P = .012) and 3.56 points worse on MAP mathematics (95% CI: 0.52-6.6; P = .022); they had 48.8% (95% CI: 1.9%-73.2%; P = .044) and 58.0% (95% CI: 21%-78%; P = .007) lower odds of proficiency on PARCC English/Language Arts and Mathematics, respectively compared to those without asthma.

CONCLUSIONS

The relationship between asthma and poorer academic achievement in 1 school year may be magnified over multiple years, particularly among those with more significant asthma. School-based asthma interventions may support academic growth and more equitable health outcomes.

A case report of a retained interventricular septal bullet after gunshot wound

Cardiac gunshot injuries herald a universally grim prognosis. We present an exceedingly unique case of a patient surviving multiple gunshot wounds with two bullet fragments lodged in the interventricular septum.

A 25-year-old male sustained four gunshot wound injuries to the upper body. Two cardiac interventricular septal bullet fragments were identified during his recovery. Management included serial echocardiographic surveillance and a two-month regimen of empiric colchicine for prophylaxis against post-traumatic pericarditis.

Pursuing non-operative management especially in asymptomatic or stable patients should be evaluated against surgical extraction and possible sequelae of complications. The consideration of scheduled colchicine for pericarditis prophylaxis is warranted as well as interval echocardiogram.

Retained myocardial bullets are exceedingly rare clinical events with scant literature available to guide clinical decisions. Management requires intricate decision-making and close consideration of risk benefit analysis weighing surgical extraction against non-operative management.

PICU Passport: Pilot study of a handheld resident curriculum

BACKGROUND

To explore the impact of an educational tool designed to streamline resident learning during their pediatric intensive care (PICU) rotations.

METHODS

Topics and procedures were chosen for inclusion based on national requirements for pediatric residents. Residents received a PICU Passport at the beginning of their rotations. PICU faculty were provided learning objectives for each topic. Residents and faculty were surveyed before and after starting use of the Passport.

RESULTS

Twenty-two residents pre-Passport and 38 residents post-Passport were compared. Residents were more satisfied with their educational experiences (27 % vs. 79 %; P < 0.001), more likely to report faculty targeted teaching towards knowledge gaps (5 % vs. 63 %; P < 0.001) and felt more empowered to ask faculty to discuss specific topics (27 % vs. 76 %; P = 0.002). The median number of teaching sessions increased from 3 to 10 (Z = 4.2; P < 0.001). Most residents (73 %) felt the Passport helped them keep track of their learning and identify gaps in their knowledge.

CONCLUSIONS

The PICU Passport helps residents keep track of their learning and identify gaps in their knowledge. Passport use increases resident satisfaction with education during their PICU rotation and empowers residents to ask PICU faculty to address specific knowledge gaps.

Higher Child Body Mass Index Is Associated with Greater School-Based Health Center Utilization

Background: Children with overweight status and obesity seek care for acute illnesses more often than normal weight peers. School-based health centers (SBHCs) have a role in acute and chronic disease management; however, little is known about SBHC use by children with overweight status and obesity. This study compared SBHC utilization by student body mass index (BMI) category and investigated whether SBHC visit diagnoses varied by BMI category. Methods: We performed a retrospective analysis of students (n = 1161) in grades K-8 enrolled in a large SBHC for 2 years. Negative binomial regression models were used to test the independent association between BMI category as defined by BMI percentile [normal/underweight (BMI percentile <85%) and overweight/obesity (BMI percentile ≥85%), either overweight (85% ≤BMI percentile <95%) or obesity (BMI percentile ≥95%)], and the number of SBHC visits (nurse, clinician, and total visits) for the 2-year interval. Top five diagnoses based on ICD-10 visit codes were compared. Results: Students in the overweight/obesity category (BMI percentile ≥85%) had higher visit rates than normal/underweight peers after adjusting for age and gender, but only total visits were statistically significant [nurse: incident rate ratio (IRR) 1.42 (95% CI 0.94-2.15); clinician: 1.27 (95% CI 0.93-1.75); total: 1.45 (95% CI 1.02-2.07)]. Visit diagnoses were similar by BMI category. Conclusions: Students with higher BMI percentiles, categorized as overweight/obesity, had higher SBHC utilization than normal/underweight peers, but visit diagnoses were similar. This higher utilization may provide an as-yet untapped opportunity to expand school-based obesity prevention and management.

Parotid adenocarcinoma metastasis to the breast: a case report

Metastatic salivary gland tumors are rare clinical entities of the head and neck. Parotid gland carcinoma with distant metastases heralds a poor prognosis with a median survival of 4.3-7.3 months. The lungs, long bones, liver and brain are the most common sites of metastasis for parotid gland cancer, along with a few reported cases describing metastasis to the ileum, spleen and iliac crest. We present the first case to our knowledge of parotid adenocarcinoma metastasis to the breast.

Management of newborns exposed to mothers with confirmed or suspected COVID-19

There is limited information about newborns with confirmed or suspected COVID-19. Particularly in the hospital after delivery, clinicians have refined practices in order to prevent secondary infection. While guidance from international associations is continuously being updated, all facets of care of neonates born to women with confirmed or suspected COVID-19 are center-specific, given local customs, building infrastructure constraints, and availability of protective equipment. Based on anecdotal reports from institutions in the epicenter of the COVID-19 pandemic close to our hospital, together with our limited experience, in anticipation of increasing numbers of exposed newborns, we have developed a triage algorithm at the Penn State Hospital at Milton S. Hershey Medical Center that may be useful for other centers anticipating a similar surge. We discuss several care practices that have changed in the COVID-19 era including the use of antenatal steroids, delayed cord clamping (DCC), mother-newborn separation, and breastfeeding. Moreover, this paper provides comprehensive guidance on the most suitable respiratory support for newborns during the COVID-19 pandemic. We also present detailed recommendations about the discharge process and beyond, including providing scales and home phototherapy to families, parental teaching via telehealth and in-person education at the doors of the hospital, and telehealth newborn follow-up.

Operative Technique for Laparoscopic Placement of Continuous Ambulatory Peritoneal Dialysis Catheter

Background: Peritoneal dialysis (PD) is an increasingly utilized treatment modality for renal replacement therapy that affords medical and lifestyle benefits to the patient and financial savings to the health care system. Successful long-term use of PD is reliant upon an optimally functioning catheter. Many potential catheter-related complications can be avoided through utilizing optimal placement technique. As widespread use of PD as a renal replacement modality continues to increase, the need for a safe, standardized, catheter placement technique has become more evident. Objectives: To present a succinct synopsis of the rationale and elements of our current surgical management strategy for patients undergoing evaluation for PD and to provide a detailed stepwise description of our operative technique for PD catheter placement. This review describes potential pitfalls that may prevent optimal catheter function and describes each step taken to prevent potential complications. This description is combined with intraoperative photographs to highlight key steps. Conclusion: Following a defined reproducible stepwise approach, laparoscopic placement of continuous ambulatory peritoneal dialysis catheters can be performed safely and known potential complications hindering optimal catheter function can be addressed prophylactically.

Prevalence and predictors of airflow obstruction in an HIV tertiary care clinic in Montreal, Canada: a cross-sectional study

Objectives

The reported prevalence of chronic obstructive pulmonary disease (COPD) in people living with HIV (PLWHIV) varies widely. Our objective was to estimate the prevalence of airflow obstruction and COPD in unselected PLWHIV and identify characteristics that increase the risk of nonreversible airflow obstruction in order to guide case finding strategies for COPD.

Methods

All adults attending the Chronic Viral Illness Service were invited to participate in the study, regardless of smoking status or history of known COPD/asthma. Individuals underwent spirometric testing both before and after use of a salbutamol bronchodilator. Airflow obstruction was defined as forced expiratory volume in 1 s (FEV₁)/forced vital capacity (FVC) < 0.7 post‐bronchodilation, whereas COPD was defined as FEV₁/FVC < 0.7 post‐bronchodilation and Medical Research Council (MRC) score > 2. Multivariate logistic regression was used to evaluate risk factors associated with airflow obstruction, reported as adjusted odds ratios (aORs).

Results

Five hundred and three participants successfully completed spirometry testing. The median (Q1; Q3) age was 52 (44; 58) years. The median (Q1; Q3) CD4 count was 598 (438; 784) cells/μL and the median (Q1; Q3) nadir CD4 count was 224 (121; 351) cells/μL. There were 119 (24%) current smokers and 145 (29%) former smokers. Among those screened, 54 (11%) had airflow obstruction whereas three (1%) of the participants had COPD. Factors that were associated with airflow obstruction included a history of smoking [aOR 2.2; 95% confidence interval (CI) 1.1; 4.7], older age (aOR 1.6; 95% CI 1.2; 2.2), and lower CD4 count (aOR 0.8; 95% CI 0.7; 1.0).

Conclusions

Airflow obstruction was relatively uncommon. Our findings suggest that PLWHIV who are ≥50 years old, smokers and those with nadir CD4 counts ≤ 200 cells/μL could be targeted to undergo spirometry to diagnose chronic airflow obstruction.

iPhone-based Pupillometry: A Novel Approach for Assessing the Pupillary Light Reflex

SIGNIFICANCE

The response of the pupil to a flash of light, the pupillary light reflex (PLR), is an important measure in optometry and in other fields of medicine that is typically evaluated by qualitative observation. Here we describe a simple, portable, iPhone-based pupillometer that quantifies the PLR in real time.

PURPOSES

The purposes of this study were to describe a novel application that records the PLR and to compare its technical capabilities with a laboratory-based infrared (IR) camera system.

METHODS

Pupil sizes were measured from 15 visually normal subjects (age, 19 to 65 years) using an IR camera system and the Sensitometer test. This test elicits pupillary constriction using the iPhone flash, records pupil size using the camera, and provides measurements in real time. Simultaneous recordings were obtained with the Sensitometer test and IR camera, and two measures were calculated: (1) dark-adapted steady-state pupil size and (2) minimum pupil size after the flash. The PLR was defined as the difference between these two measures. Pupil size was also recorded during the redilation phase after the flash. Bland-Altman analysis was used to assess the limits of agreement between the two methods.

RESULTS

Statistically significant correlations between the IR and Sensitometer test measures were found for the PLR (r = 0.91, P < .001) and redilation size (r = 0.65, P = .03). Bland-Altman analysis indicated a mean PLR difference of 6% between these two methods. The PLR limit of agreement was 14%, indicating that 95% of subjects are expected to have IR and Sensitometer test measurements that differ by 14% or less. Bland-Altman analysis indicated a mean redilation size difference of 1% between the two methods; the limit of agreement was 5%.

CONCLUSIONS

There is excellent agreement between pupil responses recorded using the Sensitometer test and IR camera. The Sensitometer test provides a highly promising approach for simple, portable, inexpensive pupillary measurements.

Implementing a declination form programme to improve influenza vaccine uptake by staff in Department of Veterans Affairs spinal cord injury centres: a pilot study

BACKGROUND

Individuals with spinal cord injuries and disorders are at high risk for respiratory and influenza-related complications after developing influenza. These individuals often have frequent contact with the healthcare system. Vaccination rates in healthcare workers at Department of Veterans Affairs (VA) spinal cord injury (SCI) centres have been approximately 50% for several years. Efforts are needed to increase vaccination uptake among SCI HCWs. Declination form programmes (DFPs) in combination with other strategies have resulted in significant increases in influenza vaccination uptake in HCWs.

AIM

Use of external and internal facilitation including local teams and consensus processes to pilot a DFP in two VA SCI centres and evaluate factors influencing implementation.

METHODS

Implementation meetings and a consensus-building process with leadership and implementation team members were conducted, along with semi-structured post-implementation interviews with members of each implementation team (N = 7).

FINDINGS

The DFP was well accepted and easy to use. Leadership was a key facilitator for DFP implementation. Barriers included difficulty communicating with HCWs working during early/late shifts. Participation was 100% at Site 1 and 48% at Site 2.

CONCLUSION

Use of local teams and consensus to identify strategies to implement a DFP is feasible and effective for achieving moderate-to-high levels of participation in the programme.

Rings and slings revisited

Vascular rings and pulmonary artery slings are rare congenital anomalies that often present with symptoms of tracheal and esophageal compression. These can involve the aortic arch branches and pulmonary arteries, respectively. This review illustrates the current role of MR imaging, highlights its advantages, and provides insight into the diagnosis of these anomalies by describing the embryology and characteristic imaging features of these lesions.

Ultra-rapid elimination of biofilms via the combustion of a nanoenergetic coating

Background

Biofilms occur on a wide variety of surfaces including metals, ceramics, glass etc. and often leads to accumulation of large number of various microorganisms on the surfaces. This biofilm growth is highly undesirable in most cases as biofilms can cause degradation of the instruments and its performance along with contamination of the samples being processed in those systems. The current “offline” biofilm removal methods are effective but labor intensive and generates waste streams that are toxic to be directly disposed. We present here a novel process that uses nano-energetic materials to eliminate biofilms in < 1 second. The process involves spray-coating a thin layer of nano-energetic material on top of the biofilm, allowing it to dry, and igniting the dried coating to incinerate the biofilm.

Results

The nanoenergetic material is a mixture of aluminum (Al) nanoparticles dispersed in a THV-220A (fluoropolymer oxidizer) matrix. Upon ignition, the Al nanoparticles react with THV-220A exothermically, producing high temperatures (>2500 K) for an extremely brief period (~100 ms) that destroys the biofilm underneath. However, since the total amount of heat produced is low (~0.1 kJ/cm²), the underlying surface remains undamaged. Surfaces with biofilms of Pseudomonas aeruginosa initially harboring ~ 10⁷ CFU of bacteria /cm² displayed final counts of less than 5 CFU/cm² after being subjected to our process. The byproducts of the process consist only of washable carbonaceous residue and gases, making this process potentially inexpensive due to low toxic-waste disposal costs.

Conclusions

This novel method of biofilm removal is currently in the early stage of development. However, it has potential to be used in offline biofilm elimination as a rapid, easy and environmentally friendly method.

Effect of HPMC on the quality of wheat-free bread made from carob germ flour-starch mixtures

Carob germ proteins have been shown to have functional properties similar to wheat gluten enabling formulation and production of yeast leavened gluten-free baked goods from a true dough rather than a stiff batter. The purpose of this research was to optimize the production of wheat-free bread containing carob germ flour, corn starch, NaCl, sucrose, hydroxypropyl methylcellulose (HPMC), and H₂O. A key criterion was to formulate viscoelastic dough similar to wheat dough. To that end, response surface methodology (RSM) was used to determine optimal levels of carob germ flour, H₂O, and HPMC. Components varied as follows: 4.94%-15.05% for carob germ flour, 0.05%-3.75% HPMC, and 65.25%-83.75% H₂O (percents are on a flour basis, where carob germ flour in combination with maize starch equals 100%). Sucrose, NaCl, and yeast were held constant at 2%. Bread parameters evaluated were specific volume and crumb hardness, where the largest specific volume and the lowest value for crumb hardness were considered most desirable. The optimum formula as determined by RSM consisted of 7% carob germ flour, 93% maize starch, 2% HPMC, and 80% H₂O with predicted crumb hardness of ~200 g of force and a specific volume of ~3.5 cm³/g. When proof time was optimized, a specific volume of ~5.6 ml/g and crumb hardness value of ~156 g of force was observed. Carob germ flour may be used as an alternative to wheat flour in formulating viscoelastic dough and high quality gluten-free bread.

PRACTICAL APPLICATION

Celiac disease affects approximately 1% of the world's population. Sufferers of the disease must consume a gluten-free diet. Currently, gluten-free baked products are made from batters and lack the ability to be made from dough based systems which limits the overall processability and product variety. This research is aimed at the utilization of carob germ protein and its ability to form dough to produce an optimal gluten-free bread formulation. This will help to alleviate problems in processability and product variety associated with gluten-free baked goods.

Standardization of the immunocytochemical detection of cancer cells in BM and blood: I. establishment of objective criteria for the evaluation of immunostained cells

BACKGROUND

Detection of isolated tumor cells (TC) in BM from carcinoma patients can predict future relapse. Various molecular and immunocytochemical (ICC) methods have been used to detect these cells, which are present at extremely low frequencies of 10(-5) - 10(-6). The specificity and sensitivity of these techniques may vary widely. In 1996, a European ISHAGE Working Group was founded to standardize and optimize procedures used for the detection of minimal residual disease. We have attempted to develop objective criteria for the evaluation of immunocytochemically identifiable cancer cells.

METHODS

An interlaboratory ring experiment was performed, to compare the screening and detection of micrometastasis-positive events between different laboratories. The discrepant results induced us to establish a common consensus on morphological criteria applicable to the identification of immunostained micrometastatic TC.

RESULTS

Bared on this consensus evaluation, we propose a classification of stained elements into three groups: (1) 'TC's show pathognomonic signs of epithelial TC-nature, as defined by a clearly enlarged nucleus or clusters of > or = 2 immunopositive cells. (2) 'Probable TC's represent morphological overlap between hematopoietic cells (HC) and TC which lack pathognomonic signs of TC-nature, but do not exhibit clear morphological features of HC. These cells are considered as TC if control staining with an isotype-specific, unrelated Ab is negative. (3) 'TC-negative' cells are defined as 'false positive' HC, skin squamous epithelial cells and artefacts.

DISCUSSION

The proposed classification of immunostained events is a first step towards the development of standardized immunocytochemical assays for the detection of occult micrometastatic TC in BM or blood.

Interspecialty fellowships in oncoplastic surgery and breast reconstruction – the innovative training scheme in the United Kingdom

Abstract #4141

Improved survival rates for breast cancer have evolved with specialist multidisciplinary care and adjuvant treatment regimes. Surgical options for breast cancer are increasingly complex comprising adequate oncological resection with improved aesthetic outcome, quality of life and psychosexual function for cancer survivors. Such surgery requires oncoplastic skills and innovative techniques and is an integral part of delivering a modern surgical breast service.&#x2028; In 2002, an innovative interspecialty training program was established for senior trainees in breast and plastic surgery, initiated by senior breast specialist surgeons and funded by the Department of Health. Nine breast centres in the UK were selected for their high volume high quality specialist care in breast disease with dual training in breast and plastic surgery. Competitive application to the training program selected the highest quality trainees for a year of interspecialty Fellowship training. The demand for these posts has required a highly competitive curriculum vitae and a higher academic degree.&#x2028; Since 2004, detailed prospective data has been collected on the qualitative and quantitative experience of the Fellowship scheme. This has been questionnaire based using logbook data for quantitative technical experience and comparative qualitative data for Fellowship satisfaction and outcome in specialty training.&#x2028; 53 fellows have to 2008 completed interspecialty training. 43 have been in their penultimate or last year in higher surgical training, the majority (42) are breast trainees in general surgery, 11 are trainees in plastic and reconstructive surgery. The Fellowship maximises exposure to operative planning and surgical techniques. 62% of oncology surgery (including breast reconing procedures), 49% of (immediate and delayed) reconstructive procedures, and 49% of breast symmetrization and aesthetic surgery is performed by the trainee under direct supervision. Overall expectations and quality of the Fellowships scored 'high' to 'excellent' and this was reflected in the confidence of fellows to take up NHS Consultant posts and continue to use the skills acquired within a multidisciplinary specialised breast team.&#x2028; The interspecialty training program has been successful for both breast and plastics trainees. It has given senior surgical trainees the opportunity to focus and direct their own training requirements into an intense clinical year of surgical oncology and breast reconstruction. Key components to the success of this year include working in high volume, specialist breast and plastic reconstructive units with direct supervision from dedicated trainers, supernumerary training status and an elective surgical practice. It succeeds as a pioneering program designed to increase the number of trained surgeons offering seamless oncoplastic surgery for the benefit of the patients.

Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 4141.

Subintimal angioplasty for superficial femoral artery occlusion: poor patency in critical ischaemia

INTRODUCTION

Subintimal angioplasty has been proposed for the treatment of long segment occlusive disease and for patients with critical limb ischaemia (CLI) with significant co-morbidity. There is no consensus as to short- and long-term patency. We present our experience with this technique.

METHODS

Between 1995 and 2000, 43 consecutive patients (48 limbs) underwent subintimal angioplasty for superficial femoral artery occlusions. Outcome measures were haemodynamic and/or symptomatic patency.

RESULTS

Technical success was achieved in 14/17 limbs with CLI (82%) and 30/31 (97%) with intermittent claudication (IC). There were 7 complications (15%), 6 occurring in the claudicant group. The median occlusion length was 10 cm for CLI and 6 cm for IC. Patency at 12 and 36 months, on an intention-to-treat basis, was 69% and 58% for claudicants and 25% and 25% for patients with CLI (P = 0.0005 and P = 0.0044, respectively). Following only technically successful procedures, 12-month patency was 72% (IC) and 31% (CLI) (P = 0.009). Patients with occlusions > or = 10 cm were more likely to re-occlude than those < 10 cm (12-month patency 60% versus 25%;P = 0.037).

CONCLUSIONS

In this series, short- and long-term patency in patients with CLI is poor. Subintimal angioplasty in the treatment of CLI should be reserved for those patients not fit for surgical bypass.

Interactions between selenium and sulphur nutrition in Arabidopsis thaliana

Selenium (Se) is an essential plant micronutrient, but is toxic at high tissue concentrations. It is chemically similar to sulphur (S), an essential plant macronutrient. The interactions between Se and S nutrition were investigated in the model plant Arabidopsis thaliana (L.) Heynh. Arabidopsis plants were grown on agar containing a complete mineral complement and various concentrations of selenate and sulphate. The Se/S concentration ratio in the shoot ([Se](shoot)/[S](shoot)) showed a complex dependence on the ratio of selenate to sulphate concentration in the agar ([Se](agar)/[S](agar)). Increasing [S](agar) increased shoot fresh weight (FW) and [S](shoot), but decreased [Se](shoot). Increasing [Se](agar) increased both [Se](shoot) and [S](shoot), but reduced shoot FW. The reduction in shoot FW in the presence of Se was linearly related to the shoot Se/S concentration ratio. These data suggest (i) that Se and S enter Arabidopsis through multiple transport pathways with contrasting sulphate/selenate selectivities, whose activities vary between plants of contrasting nutritional status, (ii) that rhizosphere sulphate inhibits selenate uptake, (iii) that rhizosphere selenate promotes sulphate uptake, possibly by preventing the reduction in the abundance and/or activity of sulphate transporters by sulphate and/or its metabolites, and (iv) that Se toxicity occurs because Se and S compete for a biochemical process, such as assimilation into amino acids of essential proteins.

Primary reversed gastric tube reconstruction in long gap esophageal atresia

BACKGROUND/PURPOSE

Esophageal reconstruction in long-gap esophageal atresia (EA) poses a technical challenge with several surgical options. The purpose of this study was to review the authors' experience with the reversed gastric tube (RGT) in esophageal reconstruction.

METHODS

This series describes 7 babies with pure EA treated at 2 centers between 1989 and 2001. Data, gathered by retrospective chart review, included clinical details of the esophageal and associated malformations, technique and timing of repair, early and late complications, and long-term follow-up. Institutional review board (IRB) approval of this study has been obtained.

RESULTS

Seven babies were included. Associated malformations were present in 4: trisomy 21 in 2 and imperforate anus in 2. After gastrostomy tube placement, patients were treated with gastrostomy tube feedings and continuous upper pouch suction. Median gap length was 5.5 vertebral segments (range, 3 to 9). RGT with a posterior mediastinal esophagogastric anastomosis was performed at median age of 62 days (range, 38 to 131). There were no anastomotic leaks. Three patients had strictures, one required resection. Exclusive oral nourishment was achieved in 5 patients by 6 months of age. At last follow-up (mean, 4.5 years), 6 patients were receiving oral nutrition exclusively, and all were maintaining growth curves.

CONCLUSIONS

In long gap EA, early esophageal reconstruction using an RGT can be performed with minimal morbidity and promising short-term results.

Oral folate reduces plasma homocyst(e)ine levels in hemodialysis patients with cardiovascular disease

INTRODUCTION

Hyperhomocyst(e)inemia (plasma homocyst(e)ine concentration >16.0 micromol/l) is an independent risk factor for atherosclerosis, and is ubiquitous in patients with end-stage renal disease (ESRD). Oral folate supplementation in the non-ESRD population has been demonstrated to reduce plasma homocyst(e)ine (Hcy) concentration, and may reduce atherosclerotic morbidity. This study was undertaken to evaluate the efficacy of folate supplementation in reducing Hcy in patients with ESRD and cardiovascular disease.

METHODS

Twenty-eight chronic hemodialysis patients with demonstrated hyperhomocyst(e)inemia (mean Hcy 35.2+/-13.3 micromol/l) were enrolled in the study. The presence of atherosclerosis was documented by history, physical examination, or ultrasonographic criteria. Hcy was determined initially and following six weeks' supplementation with 5.0mg folate and multvitamins.

RESULTS

Hcy fell a mean of 15.0+/-10.4 micromol/l (38.9+/-19.9%) following supplementation (p<0.0005, paired t-test). In patients whose Hcy 'normalized' (n=10) Hcy fell a mean of 51+/-14% compared to a reduction of 32+/-20% in 18 patients whose Hcy remained >16.0 micromol/l (p=0.02). A significant positive correlation was observed between initial Hcy and both absolute and percent reduction after folate supplementation (r=0.87, p<0.005 and 0.53, p<0.005, respectively). Seven patients with documented atherosclerosis were older (68+/-8 yr vs 51+/-5 yr, p=0.007) an tended to have lower initial and final Hcy than the 21 patients without atherosclerosis (26.8+/-9.9 vs. 38.0+/-13.3 micromol/l, p=0.051 and 16.5+/-5.0 vs. 21.3+/-6.7, p=0.06, respectively). The presence of atherosclerosis was not associated with significant alteration in the response to folate.

CONCLUSIONS

Supplementation with high-dose folate significantly reduces plasma Hcy in patients with and without atherosclerosis, and the presence of atherosclerosis does not impact on patients' response to folate and multivitamin supplementation. Hcy remained >16.0 micromol/l in the majority of patients, however, despite large absolute reductions in Hcy. Doses of folate greater than 5mg, or additional therapy may be required to further reduce Hcy in the majority of ESRD patients.

Salvage laparotomy for failure of peritoneal drainage in necrotizing enterocolitis in infants with extremely low birth weight

BACKGROUND/PURPOSE

Peritoneal drainage is a temporizing procedure for infants with extremely low birth weight (ELBW) who have perforated necrotizing enterocolitis (NEC). "Salvage" laparotomy is advocated when patients worsen after drainage. Some patients have survived with intact gastrointestinal functional after drainage alone. The purpose of this study is to determine if these salvage laparotomies are beneficial.

METHODS

The authors reviewed the records of ELBW infants treated at Stanford University with perforated NEC from 1993 through 1998. Data collected included demographic makeup, type of operation, survival rate, postoperative complications, length of stay (LOS), and cost.

RESULTS

The authors treated 26 patients, 9 with laparotomy and 17 with peritoneal drainage. The peritoneal drainage group had lower birth weight and more comorbid conditions. Survival rate was similar between laparotomy and drainage: 55.6% versus 41.2%. Four patients in the drainage group underwent salvage laparotomy for perceived clinical deterioration. All of these patients died. The clinical status of patients who had salvage laparotomy and died was similar to those who did not and lived. Seven of 13 patients treated with drainage followed only by supportive care and antibiotics survived. Cost and LOS for patients undergoing salvage laparotomy were much greater than for nonsurviving patients undergoing only peritoneal drainage: 84 +/- 20 days and $660,000 compared with 34 +/- 11 days and $306,000.

CONCLUSIONS

Both primary peritoneal drainage and laparotomy should be considered primary therapy for perforated NEC. Patients undergoing peritoneal drainage typically experience clinical deterioration after operation. In this limited experience, salvage laparotomy did not appear beneficial.

Response of circulating tumor cells to systemic therapy in patients with metastatic breast cancer: comparison of quantitative polymerase chain reaction and immunocytochemical techniques

PURPOSE

We previously developed a quantitative system for the detection of cytokeratin 19 (CK-19) transcripts using reverse transcriptase polymerase chain reaction (PCR) to detect breast carcinoma cells in blood and bone marrow. The aim of this study was to determine the value of this system in monitoring patients with metastatic disease and to compare it with an established immunocytochemical method.

PATIENTS AND METHODS

Patients with progressive, locally advanced, and metastatic breast cancer (all stage IV) who were due to start systemic treatment were recruited. Blood samples were analyzed for CK-19 transcripts using quantitative PCR (QPCR) and immunocytochemistry (ICC) throughout their course of treatment.

RESULTS

One hundred forty-five blood samples were obtained from 22 patients over 13 months. Seventy-two (49.6%) of these samples were positive by QPCR, and 56 (42%) of 133 were positive by ICC. Of the 133 specimens analyzed by both techniques, 95 (71.4%) had the same results for each, and of the 71 samples that were positive, 40 (56%) were positive by both methods. The relationship between the number of cells detected and the QPCR values was statistically significant (P <.0001). Of the 25 courses of assessable treatment, 17 (68%) of 25 treatment outcomes (either response or disease progression) were reflected by QPCR measurements, and 12 (57%) of 21 were reflected by ICC. During the course of the study, five patients showed a response, and of these, ICC was in agreement in four cases (80%) and QPCR in three cases (60%). Eighteen courses of treatment resulted in progression of the disease; however, only 15 of these were assessable by ICC. ICC was in agreement in eight (53%) of 15 of these cases, and QPCR in 15 (83%) of 18 cases.

CONCLUSION

Circulating carcinoma cells are frequently found in patients with metastatic breast cancer. In the majority of patients, cancer cell numbers as evaluated by QPCR or ICC reflected the outcome of systemic treatment.

Microsatellite alterations plasma DNA of primary breast cancer patients

The aim of this study was to analyze plasma DNA from primary and metastatic breast cancer cases for tumor-specific alterations and to compare these findings with immunocytochemistry and estimation of cytokeratin 19 (CK19) mRNA for detection of micrometastases. DNA was extracted from plasma, lymphocytes, and microdissected tumor tissue sections obtained from 71 patients with breast cancer and 9 controls. DNA samples were analyzed for loss of heterozygosity (LOH) and/or microsatellite instability (MI) by PCR with two polymorphic markers (DM-1 and D16S400). Reverse transcription-quantitative PCR (QPCR) and immunocytochemistry were used for detection of CK19 mRNA and protein. Breast cancer plasma DNA displayed frequent LOH (31.3%) and MI (11.6%) supported by the same alteration in microdissected tumor DNA. Most notably, 10 of the 39 patients with primary breast cancer showed LOH (n = 6) or MI (n = 4). We compared plasma tumor DNA, plasma and bone marrow QPCR, and blood and bone marrow immunocytochemistry in 32 of the patients with primary cancer. Of these, only one patient had immunocytochemically detectable carcinoma cells in the blood, and three showed abnormally high levels of plasma CK19 mRNA. All four of these patients had plasma DNA alterations. We then compared bone marrow findings: of the 10 primary breast cancers that showed LOH or MI, 6 had elevated CK19 mRNA and 5 had immunocytochemically positive cells. Tumor DNA is readily detectable in plasma of primary and metastatic breast cancer patients, and plasma DNA alterations (LOH and MI) reflect those seen in the tumor. The application of microsatellite analyses to plasma DNA may be useful in assessing tumor burden in breast cancer patients, particularly when combined with QPCR, and is preferable for patients with breast cancer, for whom sequential bone marrow aspiration is undesirable.

Cardiovascular and renal benefits of dry bean and soybean intake

Dry beans and soybeans are nutrient-dense, fiber-rich, and are high-quality sources of protein. Protective and therapeutic effects of both dry bean and soybean intake have been documented. Studies show that dry bean intake has the potential to decrease serum cholesterol concentrations, improve many aspects of the diabetic state, and provide metabolic benefits that aid in weight control. Soybeans are a unique source of the isoflavones genistein and diadzein, which have numerous biological functions. Soybeans and soyfoods potentially have multifaceted health-promoting effects, including cholesterol reduction, improved vascular health, preserved bone mineral density, and reduction of menopausal symptoms. Soy appears to have salutary effects on renal function, although these effects are not well understood. Whereas populations consuming high intakes of soy have lower prevalences of certain cancers, definitive experimental data are insufficient to clarify a protective role of soy. The availability of legume products and resources is increasing, incorporating dry beans and soyfoods into the diet can be practical and enjoyable. With the shift toward a more plant-based diet, dry beans and soy will be potent tools in the treatment and prevention of chronic disease.

Quantitative polymerase chain reaction for the detection of micrometastases in patients with breast cancer

PURPOSE

Previous reports have indicated that reverse transcriptase polymerase chain reaction (RT-PCR) for cytokeratin 19 (CK-19) may be useful in the management of patients with breast cancer. However, the specificity of this technique is low, principally because of a high rate of false-positive results. To improve the specificity of this assay, we developed a quantitative RT-PCR methodology that enables an estimate to be made of the number of CK-19 transcripts in blood and bone marrow samples.

PATIENTS AND METHODS

We examined 45 peripheral-blood samples and 30 bone marrow samples from patients with a variety of nonneoplastic conditions using nested RT-PCR for CK-19. We also examined bone marrow and peripheral-blood samples from 23 patients with primary breast cancer and peripheral-blood samples from 37 patients with metastatic breast cancer. The number of CK-19 transcripts was estimated in positive specimens by competitive PCR and normalized to the number of ABL transcripts as an internal control for the quality and quantity of cDNA. RT-PCR results were compared with the numbers of CK-19-positive cells detected by immunocytochemistry.

RESULTS

Analysis of samples from patients without cancer enabled us to define an upper limit for the background ratio of CK-19 to ABL transcripts (1:1,000 for blood samples and 1:1,600 for bone marrow samples). Using these figures as cut-off points, elevated CK-19: ABL ratios were detected in peripheral-blood samples of 20 of 37 (54%) patients with metastatic breast cancer and in bone marrow samples of 14 of 23 (61%) patients with primary breast cancer. Only three of 23 (13%) primary breast cancer peripheral-blood samples and none of the control samples were positive by these criteria. Only two of 23 patients (9%) with primary breast cancer showed immunocytochemically detectable cells in the blood; 10 of 23 (43%) showed immunocytochemically detectable cells in the bone marrow. Of 36 patients with metastatic breast cancer, eight (22%) showed positive events.

CONCLUSION

Quantitative RT-PCR for CK-19 detects a percentage of patients with breast cancer and may enable the progression or regression of the disease to be monitored.

Effects of soy protein on renal function and proteinuria in patients with type 2 diabetes

For > 150 y, clinicians and investigators have observed that high protein intakes accelerate the progression of renal disease and that low protein intakes have beneficial effects. Some studies suggest that the effects of soy-protein intake resemble those of a low-protein diet. The Brenner hypothesis suggests that high protein intakes by diabetic individuals create hyperfiltration and glomerular hypertension eventuating in renal damage. On the basis of the available evidence, we are proposing the soy-protein hypothesis, which states that substituting soy protein for animal protein in diabetes patients results in less hyperfiltration and glomerular hypertension and, therefore, resultant protection from diabetic nephropathy. Furthermore, substituting soy protein for animal protein should have therapeutic value in diabetic nephropathy with resultant slowing of deterioration of renal function and decreasing proteinuria. The preliminary results of the study of 8 type 2 diabetes patients with obesity, hypertension, and proteinuria are reported. Under the conditions of the study, providing soy protein as half of the daily protein intake had no distinct effects on renal function or proteinuria in these subjects. Soy-protein intake was associated with a significant reduction in serum cholesterol and triacylglycerol concentrations. Further studies are required to critically examine the effects of soy-protein intake on the renal function of diabetes patients.

A comparison of coronary artery bypass grafting and percutaneous transluminal coronary angioplasty in patients on hemodialysis

The hospital records of 22 patients on hemodialysis undergoing coronary artery bypass grafting, and 19 others undergoing percutaneous transluminal coronary angioplasty were reviewed to compare the outcomes of these procedures in this population. Evidence of previous myocardial infarction or triple vessel or left main coronary artery disease was more common in patients undergoing coronary artery bypass graft than those undergoing percutaneous transluminal coronary angioplasty. Perioperative mortality and complication rates following coronary artery bypass graft (4.5% and 41%, respectively) were similar to those following percutaneous transluminal coronary angioplasty (5.3% and 42%). Cardiac event-free rates at 18 months by life-table analysis following coronary artery bypass graft and percutaneous transluminal coronary angioplasty were 87 +/- 16% and 40 +/- 14%, respectively. Survival at 18 months were 67 +/- 17% following coronary artery bypass graft and 69 +/- 14% following percutaneous transluminal coronary angioplasty. Cardiac events were observed to occur in three patients undergoing coronary artery bypass graft at a median of 10 months, and in nine patients following percutaneous transluminal coronary angioplasty at a median of 6 months. One patient required percutaneous transluminal coronary angioplasty after the initial coronary artery bypass graft. Seven patients required repeat percutaneous transluminal coronary angioplasty, and two patients underwent coronary artery bypass graft after initial percutaneous transluminal coronary angioplasty. Although these conclusions are limited by the retrospective nature of the study, it is concluded that coronary artery bypass graft can be performed with morbidity and mortality equivalent to percutaneous transluminal coronary angioplasty, and provides better cardiac event-free rates than percutaneous transluminal coronary angioplasty in patients on hemodialysis. Percutaneous transluminal angioplasty does not appear to be justified in this population because of its unacceptably high restenosis and cardiac event rates.

Interobserver reliability of detecting lumbar intervertebral disc high-intensity zone on magnetic resonance imaging and association of high-intensity zone with pain and anular disruption

STUDY DESIGN

Retrospective analysis of a spine imaging center's records of patients with chronic low back pain referred by tertiary care facilities.

OBJECTIVES

1) To assess the interobserver reliability of detecting lumbar intervertebral disc high-intensity zone on T2-weighted magnetic resonance imaging, and 2) to assess the relation between high-intensity zone and discography or post-computed tomography in symptomatic patients with low back pain.

SUMMARY OF BACKGROUND DATA

Two of the three previous studies on this subject found an association between high-intensity zone and the presence of Grade 4 anular disruption with discographic reproduction of patients' exact low back pain.

METHODS

Records of patients with low back pain who had undergone lumbar spine discography injection and post-computed tomography from June 1995 to August 1996 were reviewed. Two independent observers were asked to identify the presence of an high-intensity zone from the T12-L1 disc to L5-S1 on T2-weighted magnetic resonance images. With this data, interobserver reliability was assessed with the kappa statistic. Concordant high-intensity zone results were then compared with the Dallas Discogram rating for anular disruption and to patients' subjective pain response to discography injection. With this data, the sensitivity, specificity, and predictive values of high-intensity zone for detecting disc disruption and pain response were calculated.

RESULTS

The interobserver reliability for detecting a high-intensity zone in a given disc was fair to good (kappa = 0.57; 95% confidence interval = 0.44, 0.70). The sensitivity of high-intensity zone for detecting Grade 4 anular disruption and exact pain was poor (31%) but its specificity was relatively high (90%). The positive predictive value of a high-intensity zone was low (40%) for a severely disrupted and exactly painful disc.

CONCLUSIONS

The interobserver reliability of detecting a high-intensity zone and the positive predictive value of the presence of a high-intensity zone for detecting a severely disrupted and exactly painful disc were much lower than previous studies have shown. The relatively low positive predictive value may be attributable to differences in sample characteristics or procedural variations, or suggest that a high-intensity zone is not indicative of exactly painful internal intervertebral disc disruption.

Oral midazolam: pediatric conscious sedation

Dentists attempt to overcome patients' fears by using various oral, intramuscular, intravenous, and inhalational anxiolytic agents. This article discusses the use of oral midazolam as an alternative to oral diazepam in the management of the pediatric patient.

Congenital diaphragmatic hernia associated with aortic coarctation

Congenital diaphragmatic hernia (CDH) may be associated with other anomalies, most frequently cardiovascular in nature. Despite fetal echocardiography, diagnosis of an accompanying cardiac malformation often is not made until after birth and sometimes not until after extracorporeal membrane oxygenation (ECMO) has been instituted. Aortic coarctation associated with CDH may occur as an isolated, surgically correctable malformation or it may be a component of the usually fatal left heart "hypoplasia" or "smallness" syndrome. The authors present two cases of aortic coarctation associated with CDH requiring ECMO that illustrate the management challenges of these coincident diagnosis. In one case, the accompanying coarctation was suspected and required precannulation angiography for confirmation, whereas in the other case, the diagnosis of coarctation was not made until after ECMO cannulation. Depending on its anatomic location and severity, an aortic coarctation associated with life-threatening CDH may limit the physiological efficacy of venoarterial ECMO. Furthermore, arterial cannulation for extracorporeal support requires that flow through the remaining carotid artery be maintained during aortic reconstruction, which may prove difficult for lesions best treated by subclavian flap angioplasty. When the diagnosis of coincident aortic coarctation and CDH is suspected or proven before institution of extracorporeal support, serious consideration should be given to venovenous bypass, because this may provide better postductal oxygenation and facilitate aortic repair with the option of left carotid artery inflow occlusion.

Reconstruction of a severely atrophic maxilla using a Le Fort I downgraft and dental implants: clinical report

A 55-year-old woman developed chronic infections of the maxillary sinuses with osteomyelitis resulting in extensive bone destruction and atrophy from a failed subperiosteal implant. After surgical removal of the subperiosteal implant, extensive debridement of the maxilla, and long-term antibiotic therapy, maxillary reconstruction was initiated. A Le Fort I osteotomy and downgraft was performed, and a posterior iliac bone graft was harvested and grafted to reconstruct the severely atrophic maxilla. In a later surgical procedure, maxillary and mandibular implants were placed. Implant-retained overdentures were fabricated to restore function and esthetics.