Psychotropic Medication Prescribing Across Medical Providers, 2016-2019

OBJECTIVE

The authors sought to provide updated estimates of the proportion of psychotropic medications prescribed by different medical providers.

METHODS

This pooled cross-sectional study used data from the Medical Expenditure Panel Survey (2016-2019). Nationally representative estimates of the percentages of all psychotropic medications prescribed by each provider type were calculated, and analyses stratified by medication type, insurance type, and age were conducted.

RESULTS

Data from 58,547 psychotropic prescriptions reported by 7,693 unique individuals were analyzed. More than 60% of psychotropic medications were prescribed by providers other than psychiatrists (33.5%) or psychologists (2.2%), such as general practitioners, nurse practitioners, and physician assistants. This distribution varied significantly by medication, insurance, and patient age.

CONCLUSIONS

Most psychotropic medication prescribing occurs in primary care; however, notable differences by medication, insurance, and age were observed, suggesting areas for future research.

Pediatric Mental Health Care and Scope-of-Practice Expansions

To examine the association between psychologist and nurse practitioner scope-of-practice (SoP) regulations and pediatric mental health service access. A nationally representative sample of children with mental health needs was identified using 5 years of National Survey of Children's Health (2016-2020). Utilization was measured in two ways: (1) unmet mental health care needs and (2) receipt of mental health medication. Expanded SoP for psychologists and nurse practitioners was measured based on the child's state of residence and the year of the survey. The associations between both SoP expansion and both outcomes were assessed using logistic regression models adjusted for multiple covariates. The probability of having unmet mental health needs was 5.4 percentage points lower (95% CI - 0.102, - 0.006) for children living in a state with psychologist SoP expansion; however, there was no significant difference in unmet mental health needs between states with and without NP SoP expansion. The probability of receiving a mental health medication was 2.0 percentage points higher (95% CI 0.007, 0.034) for children living in a state with psychologist SoP expansion. Conversely, the probability of receiving a mental health medication was 1.5 percentage points lower (95% CI - 0.023, - 0.007) for children living in a state with NP SoP expansion. Expanded SoP for psychologists is associated with improved access to pediatric mental health care in terms of both unmet need and receiving medication. Expanded SoP for NPs, however, was not associated with unmet need and lower receipt of medication.

Demographics and clinical characteristics of patients of prescribing psychologists, psychiatrists, and primary care physicians

To describe the characteristics of patients receiving psychotropic medication from prescribing psychologists, psychiatrists, and primary care physicians. This descriptive study was conducted using private insurance claims of patients from New Mexico and Louisiana receiving psychotropic medications (anticonvulsants, antidepressants, antipsychotics, hypotensive agents, anxiolytics/sedatives/hypnotics, and stimulants) from 2004 to 2021 (N = 307,478). Patient characteristics were captured during the 6 months prior to their first psychotropic medication using administrative information, diagnosis and procedure codes, and medication data. Logistic regression models estimated the associations of patient characteristics with prescriber type. Additional logistic regression models estimated the association of prescriber type with medication classes prescribed. Patients were most likely to see specialists (psychologists or psychiatrists) if they had bipolar disorder (average marginal effect and 95% CI 0.214 [0.196, 0.231]), schizophrenia/psychotic disorders (0.118 [0.097, 0.138]), or had 1-4 visits of psychotherapy (0.267 [0.258, 0.026]). Specialist patients were most likely to see a prescribing psychologist if they had 1-4 visits of psychotherapy (0.196 [0.183, 0.210]) or had insomnia (0.309 [0.203, 0.415]). Prescribing psychologists were more likely to prescribe antidepressants (0.028 [0.011, 0.045]) and less likely to prescribe antipsychotics (-0.016 [-0.020, -0.012]) than psychiatrists. Primary care physicians were less likely to prescribe all psychotropic medications except antidepressants (0.011 [0.002, 0.019]) and anxiolytics (0.074 [0.067, 0.080]). Prescribing psychologists treat patients who are more similar to those of psychiatrists than patients of primary care physicians; they are less likely to prescribe antipsychotics and more likely to prescribe antidepressants. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

North Carolina Medicaid System Perspectives on Substance Use Disorder Treatment Policy Changes During the COVID-19 Pandemic

OBJECTIVE

This study aimed to describe perspectives from stakeholders involved in the Medicaid system in North Carolina regarding substance use disorder (SUD) treatment policy changes during the coronavirus disease 2019 pandemic.

METHODS

We conducted semistructured interviews in early 2022 with state agency representatives, Medicaid managed care organizations, and Medicaid providers (n = 22) as well as 3 focus groups of Medicaid beneficiaries with SUD (n = 14). Interviews and focus groups focused on 4 topics: policies, meeting needs during COVID, demand for SUD services, and staffing.

RESULTS

Overall, policy changes, such as telehealth and take-home methadone, were considered beneficial, with participants displaying substantial support for both policies. Shifting demand for services, staffing shortages, and technology barriers presented significant challenges. Innovative benefits and services were used to adapt to these challenges, including the provision of digital devices and data plans to improve access to telehealth.

CONCLUSIONS

Perspectives from Medicaid stakeholders, including state organizations to beneficiaries, support the continuation of SUD policy changes that occurred. Staffing shortages remain a substantial barrier. Based on the participants' positive responses to the SUD policy changes made during the coronavirus disease 2019 pandemic, such as take-home methadone and telehealth initiation of buprenorphine, these changes should be continued. Additional steps are needed to ensure payment parity for telehealth services.

Family Support Services and Reported Parent Coping Among Caregivers of Children with Emotional, Behavioral, or Developmental Disorders

OBJECTIVE

Caregivers of children with special health care needs (CSHCN) experience substantial strain caring for their child's special needs because of high needs for health and other support services. Caregivers of CSHCN with emotional, behavioral, or developmental problems (EBDPs) report stress and poor mental health at higher rates than caregivers of other CSHCN. Although family support services are associated with caregiver mental health and well-being among families of CSHCN, the association of these factors with caregiver coping has been underexamined.

METHOD

Using the Double ABCX Model of Family Adaptation to guide variable selection, this study uses 2016 to 2019 data from the National Survey of Children's Health. Univariate, bivariate, and multivariate logistic analyses examined the association between caregivers' receipt of adequate care coordination and emotional support services and their reported coping with the day-to-day strains of parenting. These relationships are compared between caregivers of CSHCN with and without EBDPs.

RESULTS

Receipt of adequate care coordination was associated with higher rates of caregiver-reported positive coping for all caregivers of CSHCN who have no source of emotional support. Receipt of emotional support services was associated with increased reports of positive coping for caregivers for all CSHCN as well. Caregivers reporting only informal sources of emotional support, however, also reported higher rates of positive coping when compared with caregivers with no source of emotional support.

CONCLUSION

Mobilization of resources that can aid caregivers in coordinating care and provide emotional support may play a key role in positive caregiver coping for families of CSHCN.

Examining differences in opioid deaths by race in North Carolina following the STOP Act, 2010-2019

INTRODUCTION

North Carolina's 2017 STOP Act implemented several measures to address the increasing opioid overdose death rate. However, due to racial differences prescription opioid use and treatment service access, the STOP Act may exhibit differential impacts by race. This study examined the impact of the STOP Act on opioid overdose deaths by race.

METHODS

State-level secondary data were compiled for all 50 states. Race-stratified opioid overdose rates were obtained from the Centers for Disease Control and Prevention's WONDER database from 2010 to 2019. The study obtained state-level population characteristics from the Current Population Surveys from 2010 to 2016, the CDC's 2017 Drug Surveillance Report, the National Survey of Substance Abuse Treatment Services from 2011 to 2016, and the National Survey on Drug Use and Health from 2010 to 2016. We obtained outcomes from 2010 to 2019 and state characteristics were obtained for the pre-STOP Act period (2010-2016) as available. Using the synthetic control method, we created two synthetic North Carolinas, one Black/African American and one White, from a weighted average of other states similar to North Carolina in terms of pre-STOP Act race-stratified opioid overdose rates and population characteristics. Change was assessed as the difference in the race-stratified opioid overdose death rate for North Carolina the corresponding synthetic control.

RESULTS

The opioid overdose death rate among the White population decreased by 7.17 and 8.96 deaths/100 k in 2018 and 2019 following the STOP Act (overall decrease p = .0217); however, the study found no significant change in the opioid overdose death rate among the Black/African American population (overall decrease p = .1053), with decreases 1.68 and 3.2 deaths/100 k in 2018 and 2019, respectively.

CONCLUSIONS

Our findings suggest that the STOP Act reduced the opioid overdose death rate in North Carolina among the White, but not Black/African American, population. This heterogeneous effect has implications for health equity and can inform the development of future substance use policies.

Patterns of Mental Health Service Use During the Transition to Adulthood Among Autistic Adolescents and Young Adults

Background

The time of transition into adulthood, especially when leaving school, is a time when many autistic adolescents and young adults (AYA) may stop receiving mental health services that they have relied on, leading to worse mental health outcomes. The purpose of this study was to describe patterns of mental health service use during transition to adulthood among autistic AYAs.

Methods

We performed a cross-sectional study using electronic health records from years 2015 to 2019 from one large university health care system. We included autistic individuals ages 11-27 with at least one clinical encounter annually in the cohort. Outcomes included psychotropic medications and psychotherapy received, psychotropic polypharmacy, psychiatric emergency department (ED) visits, and adverse drug events.

Results

Almost half of the 529 patients in the cohort received polypharmacy. The most common treatment was medication only (56.9%), followed by no treatment (22.7%), medication plus psychotherapy (18.7%), and psychotherapy only (data masked). The 17-21 age group had the highest odds of a psychiatric ED visit, whereas the 22-27 age group had the highest odds of receiving psychotropic medications and polypharmacy. Black AYA were more likely to receive psychotherapy and less likely to receive psychotropic polypharmacy than non-Hispanic Whites.

Conclusion

Autistic individuals may benefit from more support from the health care system for their transition into adulthood to maintain use of beneficial mental health services as they leave school and to reduce the frequency of adverse outcomes. Access to providers experienced treating the complex needs of autistic individuals is important to reduce disparities.

Neighborhood context and children's health care utilization and health outcomes: a comprehensive descriptive analysis of national survey data

While child health and health care disparities arising from unequal distribution of resources are well documented, a nationally representative inventory of health and well-being for children across the spectrum of opportunity is lacking. Using the nationally representative sample of children from pooled 2013-2017 Medical Expenditure Panel Survey data linked to the census-tract-level Child Opportunity Index 2.0, a composite measure of neighborhood health, education, and socioeconomic conditions, we describe US children's socioeconomic characteristics, health care utilization and expenditures across the spectrum of child neighborhood opportunity levels. We found that neighborhood level of child opportunity was associated with almost all of children's health status, health care utilization, expenditures, access to care, and satisfaction with care outcomes. Children living in lower-opportunity neighborhoods had the highest rates of poor physical and mental health status and fewest ambulatory care visits but accounted for the highest share of emergency department visits. Their parents were also least likely to report having positive experiences with health care, good communication with providers, and easy access to care. Our findings underscore the myriad harms to children of gaps in health, education, and financial resources at the community level and provide targets for public investments to improve child-focused outcomes.

Emotional Support Among Parents of Children With Adverse Childhood Experiences

INTRODUCTION

We assess the association between a child's exposure to adverse childhood experiences (ACEs) and the parent's current experiences of emotional support.

METHOD

This study used pooled cross-sectional data from the National Survey of Children's Health (N = 129,988). Emotional support for the parent was classified by the presence (any emotional support, no emotional support) and type (any formal support or only informal support). All models were adjusted for relevant predisposing, enabling, and need factors.

RESULTS

Having two or more ACEs was associated with a higher probability of any emotional support (average marginal effect = 0.017; 95% confidence interval = 0.002-0.032) and a higher probability of formal support (average marginal effect = 0.049; 95% confidence interval = 0.028-0.069). Several individual ACEs were associated with the presence and type of emotional support.

DISCUSSION

Parents of children with higher ACEs are likelier to have emotional support, especially formal support.

"You can get a couple of ramen noodle packs for a BusparⓇ": A qualitative examination of medication access, policy, and procedures in southern jails

BACKGROUND

Jails in the United States are required to provide health care to the over 10 million people entering jails each year, a significant portion of whom need medications. Yet little is known about the processes by which medications are prescribed, obtained, and administered to incarcerated persons in jails.

OBJECTIVE

To describe medication access, policy, and procedures in jails.

METHODS

Semi-structured interviews were conducted with administrators and health workers from 34 jails (of 125 contacted) across 5 states in the southeastern United States. The interview guide covered all aspects of healthcare in jails from entry to release; however, the present study focused on responses relating to medications. Interviews were thematically coded using a combination of deductive and inductive coding guided by the research objective.

RESULTS

Four processes described medication use chronologically from intake to release: jail entry and health screening, pharmacy and medication protocols, protocols specific to medication dispensing and administration, and medications at release. Many jails had procedures for using medications brought from home, though some declined to use these medications. Medication decision-making in jails was primarily performed by contracted healthcare providers, and most medications were obtained from contract pharmacies. Almost all jails banned narcotics; however, other medication restrictions varied by jail. Most jails charged a copay for medications. Participants discussed various privacy practices related to medication distribution, as well as approaches to diversion prevention including "crushing and floating" medications. Finally, the pre-release medication management process included transition planning that ranged from no planning to sending additional prescriptions to the patient's pharmacy.

CONCLUSIONS

Medication access, protocols, and procedures in jails varies considerably, and there is a need for further adoption of existing standards and guidelines for the use of medications in jails, such as the Assess, Plan, Identify, and Coordinate (APIC) model of community re-entry.

Examining Psychologist Prescriptive Authority as a Cost-Effective Strategy for Reducing Suicide Rates

Six states (NM, LA, IL, IA, ID, CO) grant prescriptive authority to qualified psychologists, and research has shown that these policies are associated with a reduction in suicides. In this study, we assess the cost-effectiveness of these policies in reducing suicide rates. This study used a Markov Model with a time horizon of 20 years to estimate the incremental net monetary benefit (INMB) of the policy from the societal perspective with a simulated cohort of 100,000 people. Transition probabilities and utilities were collected from the literature, and costs were assessed using a mixed macro-micro costing approach. Using this approach, we found that the 20-year INMB for the policy was estimated to be $12.81 million ($USD) per quality-adjusted life year (QALY). The probability of cost-effectiveness was greater than 50% at a willingness-to-pay threshold as low as $10,000 per QALY. The probability of cost-effectiveness was only modestly associated with the implementation costs of the policy, but was sensitive to the estimated effect of the policy intervention. The models estimated in this study support prescriptive authority for psychologists as a cost-effective strategy for reducing state-level suicide rates. A considerable amount of research is needed to understand the impact of this policy with finer granularity.

Evaluating the impact of prescriptive authority for psychologists on the rate of deaths attributed to mental illness

BACKGROUND

Five states have enacted policies granting prescriptive authority to psychologists in an effort to increase access to psychoactive medications; however, little is known regarding the public health impact of these policies. Policies in two of these states, New Mexico and Louisiana, have had sufficient time to license more than a handful of prescribing psychologists. This study estimates the impact of psychologist prescriptive authority policies in New Mexico and Louisiana on deaths attributable to mental illness and suicides.

METHODS

State-level annual death rates from all 50 states were obtained for deaths with an underlying cause of death attributable to mental illness and to suicide (1999-2013) from the Centers for Disease Control and Prevention's WONDER database. State characteristics were collected for the pre-policy time period (1999-2004). We estimated the impact of the policy on the rates of deaths attributable to mental illness and to suicide using a comparative interrupted time series design, and policy effect estimates were generated for New Mexico and Louisiana separately. We used the synthetic control method to create synthetic New Mexico and synthetic Louisiana for use as the comparators.

RESULTS

Immediately following the start of psychologist prescribing, the rate of deaths attributable to mental illness declined by 4.55 deaths per 100,000 (95% CI: [-8.30, -0.79]) in New Mexico relative to the control, but there was no change in Louisiana. There was no immediate change in the suicide rate in either state; however, the annual change in the overall suicide rate was 0.12 suicides per 100,000 (95% CI: [-0.18, -0.06]) per year lower than expected in Louisiana following implementation.

CONCLUSIONS

These findings suggest that policies granting prescriptive authority to psychologists have the potential to reduce the mental health mortality gap, though considerable questions remain.

Eligible Prescriber Experiences with Substance Use Disorder Treatment and Perceptions of Pharmacy Barriers to Buprenorphine

OBJECTIVES

The primary aim of this study was to better understand North Carolina providers' specific substance use disorder (SUD) and opioid use disorder treatment practices and buprenorphine prescribing. Furthermore, this study aimed to provide novel information regarding US South and rural providers' opioid use disorder treatment behaviors and perceptions of patient experience at community pharmacies.

METHODS

An online survey consisting of closed-ended and open-ended questions was used. Surveys were delivered to healthcare providers' e-mails and self-administered. Surveys were administered through an online survey platform.

RESULTS

In total, 332 healthcare providers, who were eligible to be X-waivered to prescribe buprenorphine, completed the online survey. Survey participants reported not having their X-waiver to prescribe buprenorphine or actively prescribing buprenorphine. The majority of participants were uncertain of potential barriers to filling buprenorphine prescriptions. Providers treating a mix of rural and urban patients reported being less likely to screen for SUDs. Although there were no rurality differences in SUD screening, providers who treat mostly rural patients reported a lack of SUD treatment options in their area.

CONCLUSIONS

Early detection of SUDs can help prevent negative health outcomes for patients. Regardless of patient rurality, providers should screen for SUDs and familiarize themselves with the patient's experience when filling a buprenorphine prescription, along with possible barriers. Furthermore, providers should incorporate questions about their patient's ability to receive buprenorphine to help ensure that patients are receiving proper and necessary treatment.

Adverse Childhood Experiences Across Birth Generation and LGBTQ Identity, Behavioral Risk Factor Surveillance System, 2019

Objectives. To identify and describe differences in exposure to adverse childhood events (ACEs) by birth generation and lesbian, gay, bisexual, transgender, and queer plus (LGBTQ+) identity. Methods. Using data from the 2019 Behavioral Risk Factor Surveillance System, we examined the odds of experiencing 4 or more ACEs for Generation X, millennials, and Generation Z relative to baby boomers (n = 56 262). We also explored differences between generations based on LGBTQ+ identity. Results. The odds of experiencing 4 or more ACEs were higher for Generation X (odds ratio [OR] = 1.67; 95% confidence interval [CI] = 1.52, 1.83), millennials (OR = 2.12; 95% CI = 1.92, 2.35), and Generation Z (OR = 2.12; 95% CI = 1.79, 2.52) than for baby boomers. This disparity was amplified by LGBTQ+ identity (P = .016). The frequency of individual ACEs also varied by generation. Conclusions. Exposure to 4 or more ACEs has increased for each generation since the baby boomers, and more so for the LGBTQ+ population. The ACEs experienced differ by generation. Public Health Implications. Increasing ACE scores suggest that younger generations may have an increased risk of ACE-related health problems. Policies are needed to prevent ACE exposure and address the potential fallout from the ACEs that have seen the largest increases. (Am J Public Health. 2022;112(4):662-670. https://doi.org/10.2105/AJPH.2021.306642).

An examination of telehealth policy impacts on initial rural opioid use disorder treatment patterns during the COVID-19 pandemic

Purpose

Tracking changes in care utilization of medication for opioid use disorder (MOUD) services before, during, and after COVID‐19‐associated changes in policy and service delivery in a mixed rural and micropolitan setting.

Methods

Using a retrospective, open‐cohort design, we examined visit data of MOUD patients at a family medicine clinic across three identified periods: pre‐COVID, COVID transition, and COVID. Outcome measures include the number and type of visits (in‐person or telehealth), the number of new patients entering treatment, and the number of urine drug screens performed. Distance from patient residence to clinic was calculated to assess access to care in rural areas. Goodness‐of‐Fit Chi‐Square tests and ANOVAs were used to identify differences between time periods.

Findings

Total MOUD visits increased during COVID (436 pre vs. 581 post, p < 0.001), while overall new patient visits remained constant (33 pre vs. 29 post, p = 0.755). The clinic's overall catchment area increased in size, with new patients coming primarily from rural areas. Length of time between urine drug screens increased (21.1 days pre vs. 43.5 days post, p < 0.001).

Conclusions

The patterns of MOUD care utilization during this period demonstrate the effectiveness of telehealth in this area. Policy changes allowing for MOUD to be delivered via telehealth, waiving the need for in‐person initiation of MOUD, and increased Medicaid compensation for MOUD may play a valuable role in improving access to MOUD during the COVID‐19 pandemic and beyond.

Brain cytokine synthesis induced by an intraparenchymal injection of LPS is reduced in MCP-1-deficient mice prior to leucocyte recruitment

We have previously shown that ischaemic lesions are smaller in monocyte chemoattractant protein-1-deficient (MCP-1(-/-)) mice than in wild-type (wt) controls. In addition to its role as a monocyte chemoattractant, monocyte chemoattractant protein-1 (MCP-1) has been proposed to contribute to lesion progression after focal ischaemia by driving local cytokine synthesis by resident glia. To investigate this hypothesis we injected lipopolysaccharide (LPS) into the brain parenchyma of MCP-1(-/-) mice and compared the resulting inflammatory response and production of proinflammatory cytokines to those in wt mice. Microglial and astrocyte morphological activation was the same in the two strains, but MCP-1(-/-) mice showed significantly lower levels of proinflammatory cytokine synthesis; interleukin-1beta (IL-1beta) and tumour necrosis factor-alpha (TNF-alpha) levels were up to 50% lower than in wt controls after 6 h. This reduced synthesis of proinflammatory cytokines occurred well before leucocyte recruitment to the central nervous system (CNS) is observed in this model of acute inflammation and thus cannot be attributed to lower numbers of recruited monocytes at the site of injury. We propose that MCP-1 contributes to acute CNS inflammation by pleiotropic mechanisms. In addition to being a potent chemoattractant for monocytes, we provide evidence here that MCP-1 can modify the responsiveness of CNS glia to acute inflammatory stimuli prior to leucocyte recruitment, thereby acting as a priming stimulus for cytokine synthesis in cells such as microglia.

Multifocal PVNS in a child--followed over 25 years

Pigmented villonodular synovitis (PVNS) is a rare disorder of unknown aetiology, characterised by a destructive fibrohistiocytic proliferation with production of villous and nodular protrusions. The disease is commonly monoarticular, and involves the knee in 80% of cases. Occurrence in a child and involvement of multiple joints are extremely unusual. We present a case of multiple joint PVNS in a patient who first presented at the age of five and was subsequently followed up for over twenty-five years. The literature on the subject is briefly reviewed.

Premature osteoarthritis of the knee associated with cartilage hypertrophy and phalangeal dysgenesis

A woman presented with premature knee osteoarthritis associated with marked femoral cartilage hypertrophy. She also exhibited phalangeal dysgenesis, suggesting this may be an unrecognised syndrome that may predispose to knee osteoarthritis.

Focal Lesions in the Rat Central Nervous System Induced by Endothelin-1

Axon injury following cerebral ischemia has received little scientific attention compared to the abundance of information dealing with the pathophysiology of grey matter ischemia. There are differences in the initial response of grey and white matter to ischemia in vitro. In this study we investigate whether the vasoactive peptide, endothelin-1, can generate a focal ischemic lesion in the white matter and compare the findings with endothelin-1-induced lesions in the grey matter. Using a minimally invasive technique to microinject endothelin-1 into selected brain regions, we observed an acute reduction in local MRI perfusion in the injected hemisphere after 1 hour. Twenty-four hours after microinjection of 10 pmoles of endothelin-1, we observed a loss of neurons in the grey matter. At 72 hours, neutrophils were absent and a macrophage/microglia response and astrocyte gliosis were detected. No breakdown in the blood-brain barrier was detected. After injection of 10 pmoles endothelin-1 into the cortical white matter, we observed prolific amyloid precursor protein-positive immunostaining (indicative of axonal disruption) and an increase in tau-1 immunostaining in oligodendrocytes at 6 hours. Similar to the grey matter lesions, no neutrophils were present, a macrophage/microglia response did not occur until 72 hours and there was no disruption in the blood-brain barrier. Focal injections of endothelin-1 into specific areas of the rat CNS represent a model to investigate therapeutic approaches to white matter ischemia.

Percutaneous laser photocoagulation of osteoid osteomas under CT guidance

AIM

The aim was to evaluate laser photocoagulation and the use of the Bonopty needle system in the treatment of osteoid osteoma.

MATERIALS AND METHODS

Five patients with osteoid osteomas were treated with computed tomography (CT)-guided, percutaneous laser photocoagulation using the Bonopty biopsy system.

RESULTS

Complete pain relief was obtained in four patients. In one patient, pain persisted until the 6 weeks follow-up but resolved within 24 h of repeating the procedure. There were no complications, and patients remained symptom free at follow-up of 4-23 months (mean, 14 months).

CONCLUSION

CT-guided laser photocoagulation of osteoid osteoma is a minimally invasive technique that represents a cost-effective alternative to surgical excision. The Bonopty needle system allows successful penetration of the sclerotic bone surrounding the nidus with manual pressure alone.

The in vitro and in vivo ultrasonographic appearances of the angio-seal percutaneous closure device

PURPOSE

To assess the ultrasound appearances of the Angio-Seal device in an animal model and in twenty patients following catheterization of the femoral artery.

MATERIALS AND METHODS

Ten patients were scanned within 8 hours of their procedure (early group) and 10 at two to four days (delayed group) using Acuson Aspen and Sequoia scanners. Colour flow images were taken and Doppler spectral analysis was performed proximal proximal to, at and distal to the Angio-Seal device. Early and delayed in vitro images were taken in a water bath in which the Angio-Seal device was deployed across a normal porcine aorta for comparison.

RESULT

In the ten early patients colour and Doppler drop out were seen in 100 percent and 90 percent respectively compared with 90 percent and 60 percent in the delayed group. The device was seen in 30 percent and 90 percent in early and delayed groups respectively. In the in vitro study the components of the device were seen and a posterior acustic shadow noted. This shadow was less obvious and the polymer anchor more easily seen in the delayed group.

CONCLUSION

The Angio-Seal device produces a consistent artifact when scanned soon after deployment. These appearances could potentially be mistaken for a vascular occlusion by the unwary in the appropriate clinical setting of acute post catheterisation lower limb ischaemia however an awareness of the normal sonographic appearances of this device would make this misinterpretation unlikely.

Comparison of matrix metalloproteinase expression during Wallerian degeneration in the central and peripheral nervous systems

The matrix metalloproteinases (MMPs) are a large family of zinc-dependent enzymes which are able to degrade the protein components of the extracellular matrix. They can be placed into subgroups based on structural similarities and substrate specificity. Aberrant expression of these destructive enzymes has been implicated in the pathogenesis of immune-mediated neuroinflammatory disorders. In this study we investigate the involvement of MMPs, from each subgroup, in Wallerian degeneration in both the central and peripheral nervous systems. Wallerian degeneration describes the process initiated by transection of a nerve fibre and entails the degradation and removal of the axon and myelin from the distal stump. A similar degenerative process occurs as the final shared pathway contributing to most common neuropathies. MMP expression and localisation in the peripheral nervous system are compared with events in the CNS during Wallerian degeneration. Within 3 days after axotomy in the peripheral nervous system, MMP-9, MMP-7 and MMP-12 are elevated. These MMPs are produced by Schwann cells, endothelial cells and macrophages. The temporospatial expression of activated MMP-9 correlates with breakdown of the blood-nerve barrier. In the CNS, 1 week after optic nerve crush, four MMPs are induced and primarily localised to astrocytes, not microglia or oligodendrocytes. In the degenerating optic nerve, examined at later time points (4, 8, 12 and 18 weeks), MMP expression was down-regulated. The absence of MMPs in oligodendrocytes and mononuclear phagocytes during Wallerian degeneration may contribute to the slower removal of myelin debris observed in the CNS. The low level of the inactive pro-form of MMP-9 in the degenerating optic nerve may explain why the blood-brain barrier remains intact, while the blood-nerve barrier is rapidly broken down. We conclude that the difference in the level of expression, activation state and cellular distribution of MMPs may contribute to the different sequence of events observed during Wallerian degeneration in the peripheral compared to the CNS.

Exploitation, autonomy, and the case for organ sales

A recent argument in favor of a free market in human organs claims that such a market enhances personal autonomy. I argue here that such a market would, on the contrary, actually compromise the autonomy of those most likely to sell their organs, namely, the least well off members of society. A Marxian-inspired notion of exploitation is deployed to show how, and in what sense, this is the case.

T-cell- and macrophage-mediated axon damage in the absence of a CNS-specific immune response: involvement of metalloproteinases

Recent evidence has highlighted the fact that axon injury is an important component of multiple sclerosis pathology. The issue of whether a CNS antigen-specific immune response is required to produce axon injury remains unresolved. We investigated the extent and time course of axon injury in a rodent model of a delayed-type hypersensitivity (DTH) reaction directed against the mycobacterium bacille Calmette-Guérin (BCG). Using MRI, we determined whether the ongoing axon injury is restricted to the period during which the blood-brain barrier is compromised. DTH lesions were initiated in adult rats by intracerebral injection of heat-killed BCG followed by a peripheral challenge with BCG. Our findings demonstrate that a DTH reaction to a non-CNS antigen within a CNS white matter tract leads to axon injury. Ongoing axon injury persisted throughout the 3-month period studied and was not restricted to the period of blood-brain barrier breakdown, as detected by MRI enhancing lesions. We have previously demonstrated that matrix metalloproteinases (MMPs) are upregulated in multiple sclerosis plaques and DTH lesions. In this study we demonstrated that microinjection of activated MMPs into the cortical white matter results in axon injury. Our results show that axon injury, possibly mediated by MMPs, is immunologically non-specific and may continue behind an intact blood-brain barrier.

Pre-cervical soft tissues: a cautionary note

Visualization of pre-cervical soft tissue swelling on a lateral radiograph is an important indicator of possible bony injury in the context of cervical spine trauma. We report a case where apparent swelling was in fact an artefact due to an inappropriately placed endotracheal tube. We recommend review of the position of endotracheal tubes when interpreting pre-cervical soft tissue swelling.

Mannosidosis: an unusual cause of a deforming arthropathy

We report on a case of a deforming arthropathy in a young man with a lysosomal storage disorder. A 31-year-old man with a known diagnosis of mannosidosis presented with a painful swollen right elbow. Radiographs of his right elbow showed a disorganised joint with multiple fragments resembling the appearances of a neuropathic joint. This case provides further evidence that a deforming arthropathy may occur as part of the spectrum of skeletal abnormalities seen in mannosidosis.

The position of the popliteal artery in the arthritic knee

We studied the position of the popliteal artery in 32 patients with primary osteoarthritis of the knee. A total of 45 knees were studied using a noninvasive technique with color-flow duplex scanning. The distance between the popliteal artery and the posterior tibial cortex was measured in various positions of flexion. The distance separating them was found to be maximal between 60 degrees and 90 degrees. The study was repeated in a smaller series of 17 patients (20 knees) after knee replacement but with less conclusive results. We believe the safest position on which to operate in primary arthroplasty is with the knee in flexion, but the safety margins are not the same in revision surgery.

Stillbirth as risk factor for depression and anxiety in the subsequent pregnancy: cohort study

OBJECTIVE

To assess women's symptoms of depression and anxiety during pregnancy and the postpartum year in the pregnancy after stillbirth; to assess relevance of time since loss.

DESIGN

Cohort study with four assessments: in third trimester and 6 weeks, 6 months, and 12 months after birth.

SETTING

Outpatient departments of three district general hospitals; subjects' homes.

SUBJECTS

60 women whose previous pregnancy ended in stillbirth after 18 weeks' gestation; 60 matched controls.

MAIN OUTCOME MEASURES

Depression and anxiety measured by Edinburgh postnatal depression scale, Beck depression inventory, and Spielberger state-trait anxiety scale.

RESULTS

In the third trimester women whose previous pregnancy had ended in stillbirth were significantly more depressed than control women (10.8 v 8.2; P=0.004) and had greater state anxiety (39.8 v 32. 8, P=0.003) The difference was accounted for by those women who conceived less than 12 months after the stillbirth, who were also more depressed at 1 year. Results in those who conceived 12 months or more after stillbirth were similar to those in their controls at all points and showed lower trait anxiety 1 year post partum. One year after the birth 8% of control women and 19% of subjects scored high for depression (P=0.39), with most of the depression among the more recently bereaved (28% v 11%; P=0.18). In the women who had experienced stillbirth, depression in the third trimester was highly predictive of depression 1 year after subsequent birth (P</=0.0005).

CONCLUSION

Vulnerability to depression and anxiety in the next pregnancy and puerperium is related to time since stillbirth, with more recently bereaved women at significantly greater risk than controls. As there are problems for mother and infant associated with high anxiety and depression during and after pregnancy, there may be advantage in waiting 12 months before the next conception.

Incidence and demographic correlates of depressive symptoms during pregnancy in an inner London population

This paper reviews the literature on antenatal depression and reports on a recent survey of depressive symptoms among 407 women attending an inner London antenatal clinic. The high level of depressive symptoms in this survey was in line with that recently reported from a deprived inner-city population in the United States. Depressive symptoms were associated with having no educational qualifications, being unmarried, the woman being unemployed, having poor support from a partner if present, and being in second or subsequent pregnancy. Doctors should be aware that women are not especially protected from symptoms of depression during pregnancy. The association with socioeconomic problems suggests that this is one aspect of morbidity among disadvantaged people. There is a need for more research on the causes of depression during pregnancy and on evaluation of medical treatment and social intervention.

The ultrasound diagnosis of posterior shoulder dislocation associated with Erb's palsy

A case is presented of an infant with Erb's palsy whose posterior dislocation of the humeral head was identified using high-resolution ultrasound following non-diagnostic plain radiographs. Posterior dislocation is associated with Erb's palsy but the diagnosis can be delayed. We suggest the early use of ultrasound in patients with Erb's palsy, as this technique is a safe, quick and reliable method of excluding posterior dislocation.

Calcific tendinitis of the gluteus maximus tendon with abnormalities of cortical bone

Calcific tendinitis of the gluteus maximus tendon is unusual and only eight cases associated with erosions of cortical bone have been reported. We present three further cases which demonstrate variation in appearances of the amorphous calcification in the tendon and cortical erosions on plain radiographs. Isotope bone scans show focal increased activity and computed tomography (CT) clearly demonstrates erosion of cortical bone and calcification within the tendon insertion of gluteus maximus. Follow-up examinations in two cases demonstrated resolution of the changes. We believe this series demonstrates the radiological features and natural history of a common condition occurring at an unusual site. Its recognition is important in order to avoid unnecessary surgical intervention. Resolution of the calcification and cortical erosions has not been previously described.

Matrix metalloproteinase expression during experimental autoimmune neuritis

Experimental autoimmune neuritis (EAN) is an animal model of Guillain-Barré syndrome. We have shown recently that BB-1101, a broad-spectrum matrix metalloproteinase (MMP) inhibitor, prevents development of EAN when given from the day of immunization and, more important clinically, reduces disease severity when given from symptom onset. This suggests the involvement of MMP activity in the pathogenesis of EAN. However, the exact function and expression patterns of MMPs in acute inflammation of the PNS have not been investigated. MMP-like enzymes are also involved in the processing of tumour necrosis factor-alpha (TNF-alpha), which has been implicated previously in the pathology associated with EAN. In the present study we investigated the profile of MMP and TNF-alpha expression and their localization in sciatic nerve tissue during EAN, using a semiquantitative competitive reverse transcriptase-coupled polymerase chain reaction and immunohistochemistry. In the normal rat PNS, four of the 10 MMPs studied were constitutively expressed and four MMPs were differentially regulated during EAN. Expression of TNF-alpha was elevated at peak disease severity and localized to Schwann cells, macrophages and endoneurial blood vessels. Expression levels of 92 kDa gelatinase and stromelysin-1 were significantly increased early in the development of EAN and continued to rise, peaking at day 15 coincident with maximum disease severity. Schwann cells and endothelial cells were the main cellular source of these enzymes. Prominent infiltration of inflammatory cells into the sciatic nerve was concordant with a significant increase in the expression levels of matrilysin and macrophage metalloelastase. Both matrilysin and macrophage metalloelastase were detected in invading macrophages, T lymphocytes and resident Schwann cells. The selective upregulation of specific MMPs during EAN and their varied cellular localization suggests that MMPs play a multifactorial role in the aetiology of EAN. Activity of MMPs could participate in the disruption of the blood-nerve barrier, breakdown of the myelin sheath, the release of TNF-alpha, and facilitate leukocyte invasion into the PNS. These observations highlight MMPs as potential targets for therapeutic intervention in acute peripheral neuropathies, such as Guillain-Barré syndrome.

Fibular fracture: detection with high resolution diagnostic ultrasound

Images

Avascular necrosis of bone following an intensified chemotherapy regimen including high dose steroids

We report the imaging findings and natural history of avascular necrosis of bone (AVN) that developed following a chemotherapy regimen including high dose steroid treatment. All patients had acute lymphoblastic (ALL) or non-Hodgkin's lymphoma (NHL). Symptoms followed the high dose steroid therapy and 28 joints in eight patients were involved, (11 knees, seven hips, five shoulders and five ankles). Plain radiographs at presentation were normal in most joints, whilst bone scintigraphy and magnetic resonance imaging (MRI) were positive. We believe that the development of AVN in these patients is most likely due to the high dose dexamethasone therapy as in all eight cases symptoms followed this stage of the regimen. Patients experiencing bone or joint pains while receiving high dose steroids as part of a chemotherapy regimen could be investigated by bone scintigraphy but MRI is preferable as it is more sensitive and specific for AVN. In this series of patients multiple joints were involved and all the male patients proceeded rapidly from bone infarction to joint collapse. If the MRI appearances are typical, an early diagnosis of AVN can be made enabling therapeutic interventions to prevent joint collapse and its associated morbidity.

Double take--fracture fishing in accident and emergency practice

OBJECTIVE

To investigate conditions where, after initially negative plain x rays following trauma, there subsequently proves to be fracture, and to explore ways in which the management might be improved.

DESIGN

A 16 month prospective study. Patient details were collected from accident and emergency (A&E) review clinics and returns, A&E ward admissions, correspondence from other services, and discussions at a weekly clinicoradiological conference. The inclusion criteria comprised A&E trauma patients with normal initial plain x rays and proven fractures on subsequent imaging for the same patient event.

SETTING

A large A&E department seeing 65,000 new attendances per annum with full back up services.

RESULTS

55 cases were identified: 41 fractures were identified on subsequent plain x ray, six on bone scan, six on CAT scan, and two on MRI scan. The commonest regions involved were the wrist, pelvis/hip, ankle/foot, and leg. Follow up had not been arranged at the initial attendance in 17 instances and between two and 135 days were required for definitive fracture recognition. All but nine patients required alteration in treatment because of fracture detection.

CONCLUSIONS

Clinical suspicion of fracture at initial A&E attendance should prompt organised follow up even in the face of normal plain x rays. Consideration should be given to alternative imaging techniques which may have a higher resolution than plain x rays. Close corroboration between A&E and radiology departments has benefits in patient care in this group of patients and may lead to a reduction in functional disability and litigation.

Magnetic resonance imaging in macromelia and macrodactyly

We report five cases presenting with soft tissue and bone overgrowth that demonstrate the ability of MRI to establish a diagnosis in the absence of specific clinical features. Disorders included macrodystrophia lipomatosa, angiolipomatosis, Klippel-Trenaunay-Weber syndrome, blue rubber bleb naevus syndrome and one case of segmental limited hypertrophy. The MRI appearances, and other radiological features of these conditions are discussed. MRI is recommended in all cases of macrodystrophy when the clinical features and plain film findings are indeterminate.

Vitreous disposition of two acycloguanosine antivirals in the albino and pigmented rabbit models: a novel ocular microdialysis technique

A novel ocular microdialysis-perfusion technique was developed that allowed for the continuous sampling of the vitreous humor for drug. The technique produced accurate and rapid vitreous drug concentration time profiles with a resolution of 20 minutes on the time axis. The vitreous elimination of ganciclovir (GCV) and acyclovir (ACV) was extremely rapid, having vitreous half lives of 2.62 and 2.98 hours, respectively, and a transretinal mechanism of clearance was established for these compounds. Further, it was shown that the compounds do not exhibit saturation kinetics over the dosage ranges used in the clinical setting. Ocular pigmentation had a dramatic effect on the vitreous pharmacokinetics of GCV and ACV. The rate of elimination of GCV and ACV from the vitreous of the pigmented rabbit was much slower than the elimination from the albino rabbit (t 1/2 = 5.59 vs. 2.62 for GCV and 8.63 vs. 2.98 for ACV). The mean residence time of GCV was 2 times greater in the pigmented rabbit than in the albino rabbit and 3 times greater for ACV. Further, the volumes of distribution increased by 3.5 fold for GCV and 6.2 fold for ACV, respectively.

Safety and image artifact of external fixators and magnetic resonance imaging

External fixators commonly used in orthopaedic trauma and reconstruction may pose a potential safety hazard to patients exposed to magnetic resonance imaging. This interaction with the scanner depends on fixator composition, magnetism, and geometry. Image artifact produced by devices during scanning may diminish the diagnostic quality of the image. A mail survey of 91 radiologists' and 167 radiological technologists' current practices identified an absence of consensus regarding protocols for scanning patients who had external fixators in place. Eighteen external fixators were tested. Force was measured during exposure to the magnetic field at 30 cm from the magnetic resonance imaging portal, at the portal, and 30 cm inside the portal. The recordings ranged from 0 to 2.2 kg. Three fixators did not generate measurable forces and therefore are considered safe for the magnetic resonance imaging based on previously published safety standards. Ten devices did not produce measurable forces until placed at the portal, indicating that these fixators may be considered safe, providing the scanned area is distant to the fixator. To investigate image artifact, the fixators were placed on a phantom model and scanned. There was substantial variation among the fixators and image quality produced, depending on fixator composition and geometry.

Gadolinium-DTPA-enhanced MRI in the evaluation of osteonecrosis

We report the MR findings in three cases of osteonecrosis. Two cases were post-traumatic and the third idiopathic. The diagnosis, localization and characterization of osteonecrosis was improved in all patients by the use of Gadolinium-DTPA-enhanced, fat-saturated, T1-weighted spin-echo imaging. We recommend the use of Gadolinium-DTPA-enhanced MRI in selective cases of osteonecrosis as it can better define the stage of disease and suitability for surgery.

Scintigraphic evaluation of sialadenitis

Salivary gland scintigraphy using 99Tcm sodium pertechnetate and a 20-min dynamic data acquisition with a sialogogue at 10 min was employed as the primary imaging modality in sialadenitis in 32 patients. Paired asymptomatic glands within the study group were used to establish control values for a number of computer-derived functional parameters. The shape of the activity-time curve was described as: H = hyperactive, N = normal, M = median, S = sloped, F = flat, O = obstructed. Of seven patients who had ductal stones on plain films, two passed stones prior to sialography and had normal curves, whole the remaining five patients had Type O curves. Parametric evidence of gland dysfunction was identified in an additional seven symptomatic glands, six being hyperactive; histology identified an acute inflammatory infiltrate in the only excised gland in this group. Glandular hypofunction was identified in one case, in which histology revealed extensive fibrosis and glandular atrophy. Type M and S curves were found in 28 glands, 75% of which were asymptomatic. Only one gland was indicated as hypoactive by calculated parameters, and this showed a Type S curve. Scintigraphy and plain films represent the least invasive and, we feel, the most suitable primary method of investigating sialadenitis. Conventional contrast sialography may be reserved for cases with no identifiable stone but an obstructed curve. The use of functional parameters and curve morphology to determine gland dysfunction other than obstruction is non-specific, probably insensitive and is unlikely to alter clinical management. We propose an algorithm for the investigation of sialadenitis.