Evusheld, a SARS-CoV-2 spike protein-directed attachment inhibitor, appears in serum protein electrophoresis and immunofixation: a case study

Serum protein electrophoresis (SPE) and immunofixation (IFE) assays are commonly used to diagnose and monitor patients with multiple myeloma (MM). Identifying analytical interferences in SPE and IFE caused by therapeutic monoclonal antibodies (tmAbs) can be challenging. Here we report the case of a 72-year-old male with a long history of relapsed immunoglobulin (Ig)G kappa MM. A follow-up SPE showed the original peak plus 2 additional cathode peaks. Immunofixation was ordered as a reflex test to investigate the new peaks that showed initial patient monoclonal IgG kappa in addition to 2 restricted bands of the IgG kappa type. Therapeutic monoclonal antibody interference was suspected and the patient's chart was reviewed. The patient was not on any antimyeloma monoclonal antibody therapy. However, preexposure prophylaxis therapeutic monoclonal antibodies tixagevimab plus cilgavimab (Evusheld) for severe acute SARS-CoV-2 was administered approximately 45 minutes before sample collection, which led to the identifiable spikes and correlated bands. After 2 days, the IgG kappa bands disappeared, confirming this therapy's effect on SPE and IFE. Therefore, clinical pathologists should be aware of when providers prescribe new monoclonal antibody therapy and become familiar with the position of commonly prescribed (tmAbs) therapies at their institutions.

Factors associated with breast cancer screening services use among women in the United States: An application of the Andersen's Behavioral Model of Health Services Use

This study applied Andersen's Behavioral Model of Health Services Use to examine predisposing, enabling, and need factors associated with adherence to the United States Preventive Services Task Force (USPSTF) guidelines for breast cancer screening (BCS). Multivariable logistic regression was used to determine factors of BCS services utilization among 5484 women aged 50-74 from the 2019 National Health Interview Survey. Predisposing factors significantly associated with use of BCS services were: being a Black (odds-ratios [OR]:1.49; 95% confidence interval [CI]:1.14-1.95) or a Hispanic woman (OR:2.25; CI:1.62-3.12); being married/partnered (OR:1.32, CI:1.12-1.55); having more than a bachelor's degree (OR: 1.62; CI:1.14-2.30); and living in rural areas (OR:0.72; CI:0.59-0.92). Enabling factors were: poverty level [≤138% federal poverty level (FPL) (OR:0.74; CI:0.56-0.97), >138-250% FPL (OR:0.77; CI:0.61-0.97), and > 250-400% FPL (OR:0.77; CI:0.63-0.94)]; being uninsured (OR:0.29; CI:0.21-0.40); having a usual source of care at a physician office (OR:7.27; CI:4.99-10.57) or other healthcare facilities (OR:4.12; CI:2.68-6.33); and previous breast examination by a healthcare professional (OR:2.10; CI:1.68-2.64). Need factors were: having fair/poor health (OR:0.76; CI:0.59-0.97) and being underweight (OR:0.46; CI:0.30-0.71). Disparities in BCS services utilization by Black and Hispanic women have been reduced. Disparities still exist for uninsured and financially restrained women living in rural areas. Addressing disparities in BCS uptake and improving adherence to USPSTF guidelines may require revamping policies that address disparities in enabling resources, such as health insurance, income, and health care access.

Associations Between General Vaccine Hesitancy and Healthcare Access Among Arkansans

BACKGROUND

Vaccines provide protection against numerous diseases that can cause serious illness and death. However, vaccine hesitancy threatens to undermine progress in reducing preventable diseases and illness. Vaccine hesitancy has been shown to vary by sociodemographic characteristics. However, studies examining associations between healthcare access and vaccine hesitancy are lacking.

OBJECTIVE

Using a statewide random sample of Arkansas adults, we examined the relationship between general vaccine hesitancy and healthcare access.

DESIGN

From July 12 to 30, 2021, participants were contacted by landlines and cellular phones using random digit dialing.

PARTICIPANTS

A total of 1500 Arkansas adults were surveyed. Black/African American and Hispanic/Latinx adults were oversampled to ensure adequate representation. The survey had a cooperation rate of 20%.

MAIN MEASURES

The dependent variable was an ordinal measure of general vaccine hesitancy. Age, gender, race, education, relationship status, and rural/urban residence were included in the model. Healthcare access was measured across four domains: (1) health insurance coverage; (2) having a primary care provider (PCP); (3) forgoing care due to cost; and (4) time since last routine checkup. The relationship between general vaccine hesitancy and healthcare access was modeled using ordinal logistic regression, controlling for sociodemographic characteristics.

KEY RESULTS

Mean age was 48.5 years, 51.1% were women, 28% reported a race other than White, and 36.3% held a bachelor's degree or higher. Those with a PCP and those with health insurance had approximately two-thirds the odds of being more hesitant ([OR=0.63, CI=0.47, 0.84] and [OR=0.68; CI=0.49, 0.94]) than those without a PCP and those without health insurance. Participants reporting a routine checkup in the last 2 years were almost half as likely to be more hesitant than those reporting a checkup more than 2 years prior (OR=0.58; CI=0.43, 0.79).

CONCLUSIONS

Results suggest improving access to health insurance, PCPs, and routine preventative care services may be critical to reducing vaccine hesitancy.

An Online Survey and Focus Groups for Promoting Cancer Prevention Measures

In order to design a cancer prevention promotion program in the region, suggestions were solicited at a medical center. We hypothesized that a majority would be native to state, and would be able to articulate about the barriers that may exist. Through online survey and focus groups, suggestions were sought, and the knowledge and the compliance with cancer prevention recommendations were assessed to determine the participants' qualifications as potential educators. Sixty-five point two percent of participants (n = 1018) graduated from high school in Arkansas. The most commonly given suggestions were to provide education to increase awareness, to use social media for promotion, to improve access, and to reduce costs. Self-reported adherence rates to breast, cervical, and colorectal cancer screening were 82.6% (n = 954), 75.8% (n = 541), and 76.7% (n = 453), respectively. Having a personal history of cancer significantly increased colorectal cancer screening uptake (p = 0.04), but paradoxically decreased mammography uptake (p = 0.007). Salary of $40,000 and more and having a Bachelor's degree or higher were associated with higher compliance of Papanicolaou test only (p = 0.007 and p = 0.001, respectively). A majority (67.7%, n = 1056) of respondents expressed willingness to contribute to promoting cancer prevention measures, and 38.3% (n = 559) were willing to participate in focus groups. However, only 6.3% (n = 35) actually participated. The participants' knowledge and compliance appeared to be sufficient, but their follow through in focus group participation was poor.

COVID-19 vaccine hesitancy and racial discrimination among US adults

Vaccination is a critical preventive measure to reduce COVID-19 health risks. We utilize full information maximum likelihood (FIML) logistic regression to analyze COVID-19 vaccine hesitancy in a national sample of United States (US) adults (N = 2,022). Online survey data was collected between September 7th and October 3rd, 2021. Before weighting, the racial composition of the sample was as follows: Asian American (15.0 %), Black/African American (20.0 %), Hispanic/Latino (20.0 %), American Indian or Alaska Native (12.6 %), Native Hawaiian or Pacific Islander (12.5 %), and White (20.0 %). Informed by the Increasing Vaccination Model (IVM), we assessed the relationship between COVID-19 vaccine hesitancy and experiences of racial discrimination (Krieger's 9-item measure). Odds of COVID-19 vaccine hesitancy were greater for most younger age groups, women (OR = 1.96; 95 % CI[1.54, 2.49]), Black/African American respondents (OR = 1.68; 95 % CI[1.18, 2.39]), those with a high school education or less (OR = 1.46; 95 % CI[1.08, 1.98]), Independent (OR = 1.77; 95 % CI[1.34, 2.35]) or Republican political affiliation (OR = 2.69; 95 % CI[1.92, 3.79]), and prior COVID-19 infection (OR = 1.78; 95 % CI[1.29, 2.45]). Odds of COVID-19 vaccine hesitancy were 1.04 greater for every-one unit increase in lifetime experiences of racial discrimination (95 % CI[1.02, 1.05]). Odds of COVID-19 vaccine hesitancy were lower for Asian American respondents (OR = 0.682; 95 % CI[0.480, 0.969]), and those who had a primary care doctor had reduced odds of COVID-19 vaccine hesitancy (OR = 0.735; 95 % CI[0.542, 0.998). Our primary finding provides support for a link between experiences of racial discrimination and hesitancy towards a COVID-19 vaccine among US adults. We discuss implications for public health officials and future research.

P-152 COMPARISON OF ENHANCED-VIEW TOTALLY EXTRAPERITONEAL (ETEP) AND TRANSABDOMINAL (TARM) MINIMAL ACCESS TECHNIQUES FOR RETROMUSCULAR PLACEMENT OF PROSTHESIS IN THE TREATMENT OF IRREDUCIBLE MIDLINE VENTRAL HERNIA

Aim

Retromuscular or sublay meshplasty has been advocated to reinstate abdominal wall strength following ventral hernia repair while avoiding complications like visceral adhesions, fistula formation and mesh infection. We aim to compare two minimally invasive approaches of sublay hernioplasty for irreducible ventral midline hernia with respect to their efficacy and safety.

Material & Methods

We performed a retrospective study of 73 patients operated for primary and recurrent irreducible ventral midline hernia by eTEP or TARM repair with sublay meshplasty. We compared the intraoperative and post-operative complications, post-operative pain score, subjective technical ease of procedure, patient satisfaction and recurrence after 3 months and 12 months of surgery.

Results & Conclusion

There was no significant difference in the outcome of surgery and complications by the two techniques. However, there was a significant subjective technical ease in the TARM group (n=35) due to ergonomic port placement and adhesiolysis and reduction of hernia contents done under vision. The number of ports used and post-operative pain score were higher in the TARM group as compared to that of the eTEP group. 96% of the patients belonging to both groups were satisfied with their surgery after a year on telephonic follow-up. However, a multicentric study with a larger sample size would be required to establish the advantage of one technique over the other.

Comparing community-driven COVID-19 vaccine distribution methods: Faith-based organizations vs. outpatient clinics

Background

Minority and low socioeconomic communities may face practical barriers to vaccination, including decreased access to health care and less trust in healthcare organizations; however, few studies have focused on these barriers as the cause of differential vaccine uptake. We worked with community partners to implement and evaluate two community-driven approaches to COVID-19 vaccination distribution-through faith-based organizations (FBOs) and outpatient clinics-with a focus on understanding the differences between the populations who accessed each distribution method.

Methodology

Participants who came to the vaccination locations were approached and asked to complete a survey during their 15 min post-vaccination observation period. Differences between distribution locations were examined using Chi-square tests.

Results

The survey rendered 1,476 valid responses, with a total of 927 participants recruited at clinical locations and 519 at FBOs during vaccination events. There were significant differences by race/ethnicity, with distribution methods at FBOs reaching a higher proportion of Hispanic/Latino and Marshallese participants. The proportion of uninsured participants who had lower health literacy and had lower educational attainment was higher with the FBO distribution method. FBO participants were more likely to report "completely" trusting the COVID-19 vaccine. There was no significant difference between FBO and clinic participants with regard to the level of vaccine hesitancy. There were no statistically significant differences with regard to access.

Conclusion

A higher proportion of Hispanic/Latino and Marshallese participants utilized FBOs for vaccination, suggesting collaborations with FBOs can potentially increase vaccination uptake among minority communities and help mitigate vaccination disparities.

Assessment of Colorectal Cancer Screening Disparities in U.S. Men and Women Using a Demographically Representative Sample

Timely receipt of colorectal cancer (CRC) screening can reduce morbidity and mortality. This is the first known study to adopt Andersen's model of health services use to identify factors associated with CRC screening among US adults. The data from National Health Interview Survey from 2019 was utilized to conduct the analyses. Multivariable logistic regression was used to separately analyze data from 7,503 age-eligible women and 6,486 age-eligible men. We found similar CRC screening levels among men (57.7%) and women (57.6%). Factors associated with higher screening odds in women were older age, married/cohabitating with a partner, Black race, >bachelor's degree, having a usual source of care, and personal cancer history. Factors associated with lower odds for women were American Indian/Alaska Native race, living in the US for ≤10 years, ≤138% federal poverty level (FPL), uninsured or having Medicare, and in fair/poor health. For men, factors associated with higher screening odds were older age, homosexuality, married/cohabitating with a partner, Black race, >high school/general educational development education, having military insurance, having a usual source of care, and personal cancer history. Factors associated with lower odds for men were being a foreign-born US resident, living in the South or Midwest, ≤138% FPL, and being uninsured or having other insurance. Despite lower screening rates in the past, Black adults show a significantly higher likelihood of CRC screening than White adults; yet, screening disparities remain in certain other groups. CRC screening efforts should continue to target groups with lower screening rates to eliminate screening disparities.

Parent/guardian intentions to vaccinate children against COVID-19 in the United States

Vaccination is critical for protecting adults and children from COVID-19 infection, hospitalization, and death. Analyzing subsamples of parent/guardians of children age 0–11 (n = 343) and 12–17 (n = 322) from a larger national survey of US adults (n = 2,022), we aimed to assess intentions to vaccinate children and how intentions might vary across parent/guardian sociodemographic characteristics, healthcare coverage, vaccination status, political affiliation, prior COVID-19 infection, exposure to COVID-19 death(s) of family or friends, perceived norms of vaccination, and COVID-19 vaccine hesitancy. We also report the prevalence of vaccinated children for parents whose oldest child was eligible for vaccination at the time of the survey. More than one third of parents whose oldest child was not yet eligible for vaccination (11 or younger) planned to get them vaccinated right away when a vaccine became available to them. Among parents whose child was eligible to be vaccinated (age 12–17 years), approximately a third reported their child had already been vaccinated and approximately a third planned to do so right away. Intentions to vaccinate children age 0 to 11 were significantly associated with age, gender, race/ethnicity, education, COVID-19 vaccination, political affiliation, social norms, and COVID-19 vaccine hesitancy. Intentions to vaccinate children age 12 to 17 were significantly associated with age, education, healthcare coverage, COVID-19 vaccination, political affiliation, social norms, and COVID-19 vaccine hesitancy. We discuss implications for public health officials and for future research.

COVID-19 Vaccine Hesitancy and Experiences of Discrimination Among Black Adults

Early in the COVID-19 vaccine rollout, Black adults consistently reported more hesitancy than White adults, but few studies have examined variation in hesitancy among Black adults or its associations with racial discrimination. Data were collected from Black Arkansas residents age 18 and older (n = 350) between July 12^th and July 30^th, 2021, as part of a larger survey of Arkansans (N = 1500). Participants were recruited through random digit dialing of both landline and cell phones, with oversampling of Black and Hispanic residents. Respondents reported COVID-19 vaccine hesitancy, sociodemographic information, influenza vaccination history, pandemic-related experiences, and experiences of racial discrimination. Almost half (48.9%) of Black adults in Arkansas were not hesitant towards COVID-19 vaccines, while the remainder reported some level of hesitancy. Nearly a quarter were very hesitant (22.4%), while fewer reported being somewhat (14.0%) and a little (14.7%) hesitant. Using an ordered logistic regression with partial proportional odds, we find odds of COVID-19 vaccine hesitancy decreased as age and influenza vaccination increased. Odds of COVID-19 vaccine hesitancy were 1.70 times greater for Black adults who experienced the death of a close friend/family member due to COVID-19 and 2.61 times greater for individuals reporting discrimination with police or in the courts. Within-group analysis revealed nearly half of Black adults did not report any COVID-19 vaccine hesitancy and heterogeneity among those who were hesitant. Findings suggest there may be an important link between racial discrimination in the criminal justice system and COVID-19 vaccine hesitancy among Black adults.

A Review of Cancer Screening Recommendations during the COVID-19 Pandemic

BACKGROUND

Cancer screening tests are recommended to prevent cancer-associated mortality by detecting precancerous and cancerous lesions in early stages. The COVID-19 pandemic disrupted the utilization of preventive health care services. While there was a rise in the number of cancer screening tests beginning in late 2020, screenings remained 29%-36% lower than in the pre-pandemic era.

OBJECTIVE

The objective of this review article was to assist health care providers in identifying approaches for prioritizing patients and increasing breast, cervical, and colorectal cancer screening during the uncertainty of the COVID-19 pandemic.

METHODS

We used the scoping review framework to identify articles on PubMed and EBSCO databases. A total of 403 articles were identified, and 23 articles were selected for this review. Literature review ranged from January 1st, 2020 to September 30th, 2021.

RESULTS

The articles included two primary categories of recommendations: (1) risk stratification and triage to prioritize screenings and (2) alternative methods to conduct cancer screenings. Risk stratification and triage recommendations focused on prioritizing high-risk patients with an abnormal or suspicious result on the previous screening test, of certain age group and sex, having personal medical or family history of cancers, currently symptomatic, predisposed to hereditary cancers, and cancer-causing mutations. Other recommended strategies included: identifying areas facing most disparities, creating algorithms and using artificial intelligence to create cancer-risk scores, leveraging in-person visits to assess cancer risk, and providing the option of open access screenings where patients can schedule screenings and can be assigned a priority category by health care staff. Some recommended using telemedicine to categorize patients and determine screening-eligibility for patients with new complaints. Several articles noted the importance of implementing preventive measures such as COVID-19 screening prior to the procedures, maintaining hygiene measures, and social distancing in waiting rooms. Alternative screening methods which do not require an in-person clinic visit and can effectively screen patients for cancers included mailing self-collection sampling kits for cervical and colorectal cancers and implementing or expanding mobile screening units.

CONCLUSIONS

Although the COVID-19 pandemic had devastating effects on population health globally, it could be an opportunity to adapt and evolve cancer screening methods. Disruption often creates innovation, and focus on alternative methods for cancer screenings may help reach rural and under-resourced areas after the pandemic has ended.

CLINICALTRIAL

Association of psychological distress and current cigarette smoking among Native Hawaiian and Pacific Islander adults and compared to adults from other racial/ethnic groups: Data from the National Health Interview Survey, 2014

Cigarette smoking is the leading cause of preventable deaths worldwide. Research has documented an association between psychological distress and smoking among certain racial/ethnic groups but has not examined this association among Native Hawaiian and Pacific Islander (NHPI) adults. Data from the 2014 general and the NHPI-specific National Health Interview Surveys were analyzed at the University of Arkansas for Medical Sciences Regional Campus (Fayetteville, AR) in April 2021 to determine the association between current cigarette smoking and levels of psychological distress among NHPI adults and to assess the difference in the magnitude of that association among NHPI adults compared to adults of other racial/ethnic groups in the United States. The final analytic sample (n = 34,782) included 1,916 NHPI, 20,430 White, 4,725 Black, 2,001 Asian, and 5,710 Hispanic adults. A significant association between current cigarette smoking and psychological distress levels was found among NHPI adults as well as among adults from other racial/ethnic groups. There was no significant difference in the magnitude of the detected association among NHPI adults compared to the magnitude of the same association detected among adults of other racial/ethnic groups. However, this finding indicates race/ethnicity does not moderate the association between psychological distress and current cigarette smoking. Future studies should explore factors that may further explain the variation in current cigarette smoking within and across all racial/ethnic groups.

Antibiotic resistance in patients with chronic ear discharge awaiting surgery in Nepal

SETTING

Biratnagar Eye Hospital, Biratnagar, Nepal, which offers ear surgery for chronic suppurative otitis media (CSOM).

OBJECTIVE

In patients with CSOM awaiting surgery, to determine the 1) sociodemographic characteristics 2) bacterial isolates and their antibiotic resistance patterns and 3) characteristics of those refused surgery, including antibiotic resistance.

DESIGN

A cohort study using hospital data, January 2018-January 2020.

RESULTS

Of 117 patients with CSOM and awaiting surgery, 64% were in the 18-35 years age group, and 79% were cross-border from India. Of 118 bacterial isolates, 80% had Pseudomonas aeruginosa and 16% had Staphylococcus aureus. All isolates showed multidrug resistance to nine of the 12 antibiotics tested. The lowest antibiotic resistance in P. aeruginosa was for vancomycin (29%) and moxifloxacin (36%), and for S. aureus, this was vancomycin (9%) and amikacin (17%). Fourteen (12%) patients underwent surgery: myringoplasty (n = 7, 50%), cortical mastoidectomy with tympanostomy (n = 4, 29%) and modified radical mastoidectomy (n = 3, 21%). Those infected with P. aeruginosa and with resistance to over six antibiotics were significantly more likely to be refused for surgery.

CONCLUSION

Patients awaiting ear surgery were predominantly infected with multidrug-resistant P. aeruginosa and were consequently refused surgery. This study can help inform efforts for improving surgical uptake and introducing cross-border antimicrobial resistance surveillance.

"The Risk Seems Too High": Thoughts and Feelings about COVID-19 Vaccination

The purpose of this study was to describe the thoughts and feelings of individuals expressing concerns about the COVID-19 vaccine. A qualitative descriptive study was conducted in order to examine the thoughts and feelings of participants who are hesitant about the COVID-19 vaccine. Data were collected from 754 participants using an online instrument. Emergent themes included a lack of knowledge about the safety of the COVID-19 vaccine; concerns over the speed of development, testing, and approval of these vaccines; reluctance to be among the first vaccinated; concerns about the motivations of government actors, pharmaceutical companies, and others involved in producing the COVID-19 vaccine; and hesitancy about vaccines generally.

Outcomes of uninterrupted vs interrupted Periprocedural direct oral Anticoagulants in atrial Fibrillation ablation: A meta-analysis

BACKGROUND

Studies indicate that uninterrupted anticoagulation (UA) is superior to interrupted anticoagulation (IA) in the periprocedural period during catheter ablation of atrial fibrillation. Still IA is followed in many centers considering the bleeding risk. This meta-analysis compares interrupted and uninterrupted direct oral anticoagulation during catheter ablation of atrial fibrillation.

METHODS

A systematic search into PubMed, EMBASE, and the Cochrane databases was performed and five studies were selected that directly compared IA vs UA before ablation and reported procedural outcomes, embolic, and bleeding events. The primary outcome of the study was major adverse cerebro-cardiovascular events.

RESULTS

The meta-analysis included 840 patients with UA and 938 patients with IA. Median follow-up was 30 days. Activated clotting time (ACT) before first heparin bolus was significantly longer with UA (P = .006), whereas mean ACT was similar between the two groups (P = .19). Total heparin dose needed was significantly higher with IA (mean, ‒1.61; 95% CI, ‒2.67 to ‒0.55; P = .003). Mean procedure time did not vary between groups (P = .81). Overall complication rates were low, with similar major adverse cerebro-cardiovascular event (P = .40) and total bleeding (P = .55) rates between groups. Silent cerebral events (SCEs) were significantly more frequent with IA (log odds ratio, ‒0.90; 95% CI, ‒1.59 to ‒0.22; P < .01; I 2, 33%). Rates of major bleeding, minor bleeding, pericardial effusion, cardiac tamponade, and puncture complications were similar between groups.

CONCLUSIONS

UA during atrial fibrillation ablation has similar bleeding event rates, procedural times, and mean ACTs as IA, with fewer SCEs.

Assessing the Feasibility of an Online Module for Promoting Cancer Prevention Measures

OBJECTIVES

The aims of this pilot study were (1) to develop a cancer prevention module consisting of an animated video and a short questionnaire, (2) to assess new knowledge gained by the participants, and (3) to solicit feedback for improving the cancer prevention module.

METHODS

Volunteers who previously agreed to be contacted regarding research studies were approached via email. After completing the cancer prevention module, a list of cancer prevention recommendations was provided. Newly gained knowledge was assessed, and feedback was solicited.

RESULTS

Overall, 290 of 3165 individuals contacted completed the online module (9.2%), and 38.6% of the participants indicated that they learned something new about cancer prevention measures. A similar proportion, 41.4%, mentioned that they learned about measures that were recommended and due. Paradoxically, response rate was the lowest in the ≥50 year old age group although this group reported the highest rate of learning about new cancer prevention measures. Feedback was favorable in that 70.7% mentioned that the recommendations were helpful to them personally, 69.3% felt motivated to take action to reduce their risk of cancers, and 67% would recommend the online module to their friends and family.

CONCLUSION

We developed an online cancer prevention module which seems to be suitable for promoting cancer prevention measures as feedback was favorable, and new knowledge was gained. Future efforts will focus on using the module to promote cancer prevention measures to the general public particularly for the ≥50 year age group.

Sociodemographic Determinants of COVID-19 Vaccine Hesitancy, Fear of Infection, and Protection Self-Efficacy

OBJECTIVES

Arkansas COVID-19 vaccine uptake has been lower than the national average. This study examined associations between sociodemographic factors and COVID-19 vaccine hesitancy, fear of infection, and protection self-efficacy.

METHODS

Adults either residing, having employment, or receiving health care in Arkansas (n = 754) participated in an online survey between October 30, 2020 and January 16, 2021. Participants were recruited in both rural and urban areas from 6 Arkansas primary care clinics. Survey questions addressed sociodemographic factors, COVID-19 infection fear, protection self-efficacy, and COVID-19 vaccine attitudes. Bivariate and multivariable logistic regression models were used to assess associations between dependent variables and respondents' sociodemographic characteristics, COVID-19 infection fear, and COVID-19 protection self-efficacy.

RESULTS

About 38% of participants reported COVID-19 vaccine hesitancy. Age, sex, race, and education were significantly associated with COVID-19 and general vaccine attitudes. Odds of COVID-19 vaccine hesitancy decreased as age increased (OR = 0.98; P < .01). Women had higher odds of COVID-19 vaccine hesitancy than men (OR = 1.52; P < .05). Respondents with a high school diploma and below and respondents with some college or a technical degree had greater odds of COVID-19 vaccine hesitancy (OR = 2.58; P < .001; and OR = 1.97; P < .01, respectively) compared to respondents with a 4-year college degree. Black/African American respondents had greater odds of COVID-19 vaccine hesitancy compared to White respondents (OR = 3.08; P < .001). No significant difference was observed among rural and urban respondents regarding COVID-19 vaccine hesitancy; however, respondents in rural areas were more likely to report low general vaccine trust compared to those in urban areas (OR = 1.87; P < .01). Respondents reporting no fear (OR = 5.51; P < .001) and very little fear (OR = 1.95; P < .05) of COVID-19 had greater odds of COVID-19 vaccine hesitancy compared to respondents who feared COVID-19 infection to a great extent.

CONCLUSIONS

COVID-19 vaccine hesitancy and general trust in vaccines differ significantly among age, sex, race, and education. These trust and hesitancy patterns are challenges for achieving population immunity and follow similar patterns of vulnerability to COVID-19. Vaccination programs and interventions must consider these differences in COVID-19 vaccine hesitancy and general vaccine trust to alleviate COVID-19 disparities. Findings make a significant contribution in evaluating vaccine hesitancy among a large, diverse sample from a rural state.

Examining aspects of successful community-based programs promoting cancer screening uptake to reduce cancer health disparity: A systematic review

Certain minorities in the US are disproportionately burdened with higher cancer incidence and mortality rates. Programs encouraging timely uptake of cancer screening measures serve to reduce cancer health disparities. A systematic literature review was conducted to assess the effectiveness and the qualities of these programs, and to elucidate characteristics of success programs to aid in designing of future ones. We focused on community-based programs rather than clinic-based programs as the former are more likely to reach disadvantaged populations, and on prevention programs for breast, cervical, and/or colon cancers as longstanding screening recommendations for these cancers exist. PubMed, CINAHL and EBSCO databases were searched for articles that utilized community organizations and community health workers. Fourteen programs described in 34 manuscripts were identified. While 10 of 14 programs reported statistically significant increases in cancer prevention knowledge and/or increase in screening rates, only 7 of them enrolled large numbers of participants (defined as ≥1000). Only 7 programs had control groups, only 4 programs independently verified screening uptake, and 2 programs had long-term follow-up (defined as more than one screening cycle). Only one program demonstrated elimination of cancer health disparity at a population level. While most community-based cancer prevention programs have demonstrated efficacy in terms of increased knowledge and/or screening uptake, scalability and demonstration in reduction at a population level remain a challenge.

Meta-analysis comparing outcomes of catheter ablation for ventricular arrhythmia in ischemic versus nonischemic cardiomyopathy

Background

Catheter ablation is an effective treatment for ventricular arrhythmia (VA) in ischemic cardiomyopathy (ICM). However, results in non‐ICM (NICM) patients are not satisfactory, and studies comparing differences between NICM and ICM are limited. We conducted a meta‐analysis of procedural characteristics and long‐term outcomes of catheter ablation for VA, comparing results between ICM and NICM.

Methods

Studies in the PubMed, EMBASE, and Cochrane databases were systematically reviewed. Four studies reporting comparison of catheter ablation of VA between ICM and NICM were examined. The Newcastle‐Ottawa Scale was used to appraise study quality. A random‐effects model with inverse variance method was used for comparisons.

Results

Epicardial approach was significantly more undertaken for the NICM group than in the ICM group (odds ratio [OR]: 0.13; 95% confidence interval [CI]: 0.09‐0.18; P < .00001). Mean ablation time (P = .54), fluoroscopy time (P = .55), and procedural time (P = .18) did not differ significantly between the ICM and NICM groups. Procedural failure rates (OR: 0.46; 95% CI: 0.24‐0.89; P = .02) and VA recurrence rates (risk ratio [RR]: 0.68; 95% CI: 0.46‐1.01; P = .06) were significantly higher in the NICM group than in the ICM group. However, all‐cause mortality (RR: 1.37; 95% CI: 0.75‐2.49; P = .31) did not differ significantly between groups.

Conclusions

Procedural failure and VA recurrence rates were significantly higher in the NICM group, despite significantly more frequent epicardial access. These highlight the limitations of catheter ablation for VA in NICM, given our current knowledge.

Fabrication of bulk heterojunction organic solar cells with different configurations using electrospray

In this work, we fabricated bulk heterojunction (BHJ) organic solar cells (OSCs) using electrospray deposition (ESD) with two different device configurations. ITO/PEDOT:PSS/P3HT: PCBM/Ca/Al and ITO/ZnO and TiO2/P3HT: PCBM/MoO3/Ag, termed as direct and inverted OSCs, respectively. In ZnO/ TiO2 -based inverted solar cells, ZnO/ TiO2 films were synthesized by sol-gel process and deposited on ITO deposited glass substrates using the spin-coating technique. P3HT/PCBM blend layers were deposited by using electrospray deposition (ESD). To observe the thermal effects on the device efficiencies, the devices were annealed at different temperatures (up to 140 °C). The cell’s performance parameters were compared at an annealing temperature of 120 °C. Comparing the performance parameters of both types of OSCs at an annealing temperature of 120 °C, the power conversion efficiency (PCE) the 1.62% is found for direct-structured OSC while 1.57% and 1.0% for ZnO/ TiO2-based inverted structures, respectively. Interestingly, the enhanced device performance parameters were obtained with oxides-based OSCs. Compared to ZnO-based inverted OSC, the TiO2-based inverted OSC has lower efficiency which might be due to the highly resistive surface of TiO2 with deep-level traps. These traps can be reduced by light soaking to achieve the optimal power conversion efficiency.

QT prolongation in HIV-positive patients: Review article

Introduction

Antiretrovirals have immensely increased the average life expectancy of HIV-positive patients. However, the incidence of QT interval prolongation and other arrhythmias has also increased.

Methods

Pubmed and Google Scholar were searched for relevant literature published between 1990 and 2019.

Results and discussion

HIV-positive patients with high viral load, low CD4 count, chronic inflammation, and autonomic neuropathy can develop QT interval prolongation. Another factor prolonging QT interval includes exposure to the HIV transactivator protein, which inhibits hERG K (+) channels controlling IKr K (+) currents in cardiomyocytes. Protease inhibitors inhibiting the CYP3A4 enzyme can also lead to QT interval prolongation. QT interval prolongation can potentially be exacerbated by opioids, antipsychotics, antibiotics, and antifungals, the adjunct medications often used in HIV-positive patients. Hepatic insufficiency in seropositive patients on antiretrovirals may also increase the risk of QT interval prolongation.

Conclusion

Baseline and follow-up EKG in the susceptible population is suggested.

Post-trial Access in Maternal Vaccine Trials

Provisions for post-trial access (PTA) of the experimental intervention are required before the start of a clinical trial. Although there has been ample attention for PTA in the context of preventive vaccine research, discussions on PTA barely include maternal vaccine trials in which mother-infant pairs are exposed to the intervention. In maternal vaccination trials, specific PTA arrangements are required because pregnancy is transient and PTA may apply to the next pregnancy or the child. In this article, we examine the application and adherence to PTA in the context of maternal vaccine trials. We focused on differences between publications before and after 2000 when international ethical guidance documents formalized PTA requirements. Randomized maternal vaccine trials were included after a systematic search for clinical trials in phases II and III with a maternal vaccine as intervention. We used PTA as defined at the time of publication in the World Medical Association's Declaration of Helsinki (DoH) or in the ethical guidelines of the Council for International Organizations of Medical Sciences (CIOMS). In addition, we investigated whether PTA was included in the trial design. Therefore, we contacted principal investigators (PI's) of the publications found in the review to fill out a questionnaire regarding provisions for PTA. Before and after 2000, no trial articles examined in the systematic review described PTA in their trial publication (0/7, 0% and 0/17, 0%, respectively). In addition, more than half of the PI's of the trials found were not familiar with PTA recommendations in international ethical guidelines. Most cases of PTA included making knowledge available by publishing the results of the trial. The revision of the DoH in 2002 and the CIOMS ethical guidelines in 2002 has not resulted in increased PTA provisions for maternal vaccination trials. PTA is a shared responsibility of various stakeholders including sponsors, Institutional Review Boards, regulators, political entities, and researchers. Inclusion of PTA provisions in trial protocols and publications on maternal vaccination trials is essential to increase transparency on the form and content of these provisions.

Therapeutic potential of natural plant products and their metabolites in preventing radiation enteropathy resulting from abdominal or pelvic irradiation

Radiation-induced gastrointestinal injury or radiation enteropathy is an imminent risk during radiation therapy of abdominal or pelvic tumors. Despite remarkable technological advancements in image-guided radiation delivery techniques, the risk of intestinal injury after radiotherapy for abdominal or pelvic cancers has not been completely eliminated. The irradiated intestine undergoes varying degrees of adverse structural and functional changes, which can result in transient or long-term complications. The risk of development of enteropathy depends on dose, fractionation, and quality of radiation. Moreover, the patients' medical condition, age, inter-individual sensitivity to radiation and size of the treatment area are also risk factors of radiation enteropathy. Therefore, strategies are needed to prevent radiotherapy-induced undesirable alteration in the gastrointestinal tract. Many natural plant products, by virtue of their plethora of biological activities, alleviate the adverse effects of radiation-induced injury. The current review discusses potential roles and possible mechanisms of natural plant products in suppressing radiation enteropathy. Natural plant products have the potential to suppress intestinal radiation toxicity.

Complex Left Atrial Appendage Morphology Is an Independent Risk Factor for Cryptogenic Ischemic Stroke

Importance: Ischemic strokes pose a significant health burden. However, the etiology of between 20 and 40% of these events remains unknown. Left atrial appendage morphology may influence the occurrence of thromboembolic events. Design: A retrospective cross-sectional study was conducted to investigate the role of LAA morphology in patients with atrial fibrillation (AF) and cardioembolic-associated stroke and patients with cryptogenic stroke without atrial fibrillation. LAA morphology is classified into two groups: (1) simple (chicken-wing) vs. (2) complex (non-chicken wing) based on transesophageal echocardiography (TEE) findings. In addition to the LAA morphology, left atrial parameters, including orifice diameter, depth, emptying velocity, and filling velocity, were collected for both groups. Mathematical, computational models were constructed to investigate flow velocities in chicken-wing and non-chicken wing morphological patterns to assess LAA function further. Findings: TEE values for volume, size, emptying, and filling velocities were similar between simple and complex LAA morphology groups. Patients with cryptogenic stroke without coexisting AF were noted to have significantly higher rates of complex LAA morphology. Chicken-wing LAA morphology was associated with four-fold higher flow rate (kg/s) in computational simulations. Conclusions: Complex LAA morphology may be an independent contributing factor for cryptogenic strokes. Further studies are warranted to investigate the mechanism involved in LAA morphology and thromboembolic events.

Right Atrial Myxoma: An Uncommon Presentation

There are two types of tumors found in the cardiac chamber. These are divided into primary intra-cardiac tumors and secondary intra-cardiac tumors. Primary intra cardiac tumors are rare and among them 29% are myxomas. Majority of them are found in the left atrium. Here, we report a case of a myxoma in the right atrium with hepatomegaly and Hepatitis B virus infection. The coexistence of all these conditions is very rare. A 52 years old patient presented with history of shortness of breath on exertion along with fever and generalized weakness for 6 months which aggravated lately for last 2 months. He was then taken for better medical care and hospitalization. On cardiac evaluation he had soft S1 and S2 over the tricuspid region on the right lower parasternal region. He had bilateral mild pitting pedal edema. On further examination, it was revealed that he had mild tender hepatomegaly with jaundice. His blood analysis for HBsAg was positive. Echocardiogram showed right atrial myxoma of 14.3cm² almost completely occupying the right atrium and even protruding into the Inferior Venacava however not fully obstructing it. The inferior vena cava size was mildly dilated (22mm). Abdominal ultrasound report showed hepatomegaly (17.6cm) with coarse hepatic parenchyma. In this report, we emphasize the rarity of myxoma in the Right Atrium, its difficult diagnosis because of the location and the atypical presentation in the echocardiograph.

Loss of C/EBPδ enhances IR-induced cell death by promoting oxidative stress and mitochondrial dysfunction

Exposure of cells to ionizing radiation (IR) generates reactive oxygen species (ROS). This results in increased oxidative stress and DNA double strand breaks (DSBs) which are the two underlying mechanisms by which IR causes cell/tissue injury. Cells that are deficient or impaired in the cellular antioxidant response are susceptible to IR-induced apoptosis. The transcription factor CCAAT enhancer binding protein delta (Cebpd, C/EBPδ) has been implicated in the regulation of oxidative stress, DNA damage response, genomic stability and inflammation. We previously reported that Cebpd-deficient mice are sensitive to IR and display intestinal and hematopoietic injury, however the underlying mechanism is not known. In this study, we investigated whether an impaired ability to detoxify IR-induced ROS was the underlying cause of the increased radiosensitivity of Cebpd-deficient cells. We found that Cebpd-knockout (KO) mouse embryonic fibroblasts (MEFs) expressed elevated levels of ROS, both at basal levels and after exposure to gamma radiation which correlated with increased apoptosis, and decreased clonogenic survival. Pre-treatment of wild type (WT) and KO MEFs with polyethylene glycol-conjugated Cu-Zn superoxide dismutase (PEG-SOD) and catalase (PEG-CAT) combination prior to irradiation showed a partial rescue of clonogenic survival, thus demonstrating a role for increased intracellular oxidants in promoting IR-induced cell death. Analysis of mitochondrial bioenergetics revealed that irradiated KO MEFs showed significant reductions in basal, adenosine triphosphate (ATP)-linked, maximal respiration and reserved respiratory capacity and decrease in intracellular ATP levels compared to WT MEFs indicating they display mitochondrial dysfunction. KO MEFs expressed significantly lower levels of the cellular antioxidant glutathione (GSH) and its precursor- cysteine as well as methionine. In addition to its antioxidant function, GSH plays an important role in detoxification of lipid peroxidation products such as 4-hydroxynonenal (4-HNE). The reduced GSH levels observed in KO MEFs correlated with elevated levels of 4-HNE protein adducts in irradiated KO MEFs compared to respective WT MEFs. We further showed that pre-treatment with the GSH precursor, N-acetyl L-cysteine (NAC) prior to irradiation showed a significant reduction of IR-induced cell death and increases in GSH levels, which contributed to the overall increase in clonogenic survival of KO MEFs. In contrast, pre-treatment with the GSH synthesis inhibitor- buthionine sulfoximine (BSO) further reduced the clonogenic survival of irradiated KO MEFs. This study demonstrates a novel role for C/EBPδ in protection from basal as well as IR-induced oxidative stress and mitochondrial dysfunction thus promoting post-radiation survival.

Comparison of IOL power calculation formulae for pediatric eyes

PurposeTo evaluate and compare the accuracy of modern intraocular lens (IOL) power calculation formulae in pediatric eyes and compare prediction error (PE) obtained with manufacturer's vs personalized lens constant.Patients and methodsAn observational case study was conducted in 117 eyes (117 patients) undergoing pediatric cataract surgery with IOL implantation. PE was calculated as predicted refraction minus actual postoperative refraction, and absolute PE as absolute difference independent of the sign, (APE)=predicted refraction minus actual postoperative refraction. This was done for each formula using manufacturer's and personalized lens constant. Further, PE and APE were evaluated according to axial length (AL).ResultsMean age of children was 2.97 years. About 66/117 eyes (56.4%) were below 2 years of age. Using Holladay 2, Holladay 1, Hoffer Q, and SRK/T formulae with manufacturer's lens constant, mean PE was 0.36, 0.41, 0.69, and 0.28 diopter (D), respectively. With personalized lens constant, it was 0.16, 0.15, 0.50, and -0.12 D, respectively. Difference in mean PE between the formulae was statistically significant (P<0.0001). SRK/T and Holladay 2 formulae had the least PE, both with manufacturer's and personalized constant. For eyes with AL<20 mm, SRK/T and Holladay 2 formulae gave the least PE. Personalizing the lens constant led to a decrease in mean PE in all formulae, except the Hoffer Q formula. However, personalizing the lens constant did not significantly improve the APE. At least 21% eyes had an APE of >2 D with all formulae, even with personalized lens constants.ConclusionIn pediatric eyes, SRK/T and the Holladay 2 formulae had the least PE. Personalizing the lens formula constant did reduce the PE significantly for all formulae except Hoffer Q. In extremely short eyes (AL<20 mm), SRK/T and Holladay 2 formulae gave the best PE.

Analysis of pulmonary non-tuberculous mycobacterial infections after lung transplantation

PURPOSE

Non-tuberculous mycobacteria (NTM) are important pathogens in lung transplant recipients. This study describes the spectrum of NTM respiratory tract infections and examines the association of NTM infections with lung transplant complications.

METHODS

Data from 208 recipients transplanted from November 1990 to November 2005 were analyzed. Follow-up data were available to November 2010. Lung infection was defined by bronchoalveolar lavage, sputum, or blood cultures in the appropriate clinical setting. All identified NTM respiratory tract infections were tabulated. The cohort of patients with NTM lung infections (NTM+) were compared to the cohort without infection (NTM-). Univariate and multivariate analysis was performed to determine characteristics associated with NTM infection. Survival analyses for overall survival and development of bronchiolitis obliterans syndrome (BOS) were also performed.

RESULTS

In total, 52 isolates of NTM lung infection were identified in 30 patients. The isolates included Mycobacterium abscessus (46%), Mycobacterium avium complex (MAC) (36%), Mycobacterium gordonae (9%), Mycobacterium chelonae (7%), and Mycobacterium fortuitum (2%), with multiple NTM isolates seen on 3 different occasions. The overall incidence was 14%, whereas cumulative incidences at 1, 3, and 5 years after lung transplantation were 11%, 15%, and 20%, respectively. Comparisons between the NTM+ and NTM- cohorts revealed that NTM+ patients were more likely to be African-American and have cytomegalovirus mismatch. Although no difference was seen in survival, the NTM+ cohort was more likely to develop BOS (80% vs. 58%, P = 0.02). NTM+ infection, however, was not independently associated with development of BOS by multivariate analysis.

CONCLUSION

With nearly 20 years of follow-up, 14% of lung recipients develop NTM respiratory tract infections, with M. abscessus and MAC more commonly identified. M. gordonae was considered responsible for nearly 10% of NTM infections. Although survival of patients with NTM infections is similar, a striking difference in BOS rates is present in the NTM+ and NTM- groups.

Xpert(®) MTB/RIF under routine conditions in diagnosing pulmonary tuberculosis: a study in two hospitals in Pakistan

Xpert(®) MTB/RIF testing was offered to consecutive patients with presumptive tuberculosis (TB) attending two hospitals in Pakistan during April-May 2012, in addition to routine diagnostic protocol (smear microscopy, chest radiography and clinical judgement). We assessed the relative contribution of each tool in detecting pulmonary TB under routine conditions. Of 606 participants, 121 (20%) were detected as pulmonary TB: 46 (38%) by microscopy, 38 (31%) by Xpert alone and 37 (31%) on clinical and radiological grounds; 41 (65%) were detected by both Xpert and microscopy. One patient had rifampicin resistance. Although Xpert detected approximately twice as many TB cases as microscopy (n = 79, 65%), clinical judgement remained favoured by clinicians even when smear and Xpert were negative.

Rhabdomyolysis Due to Severe Hypophosphatemia in Diabetic Ketoacidosis

Rhabdomyolysis is a syndrome characterized by injury to skeletal muscle fibers with disruption and release of toxic metabolites into circulation. It is characterized by triad of muscle weakness, myalgia and dark urine and is associated with increased creatine kinase and lactate dehydrogenase. A severely malnourished 10 year old girl with severe diabetic ketoacidosis as hemr initial presentation of type 1 diabetes mellitus developed rhabdomyolysis (CK- 12,000 U/L) with non-oliguric renal failure during her initial course of hospital stay. The possible cause of her RM was attributed to severe hypophosphatemia (minimum serum phosphate, 0.8 mg/dL). Management of diabetic ketoacidosis phosphate supplementation and urinary alkalinization with diuresis improved her clinical course. She was discharged on Day 9 with Insulin. We recommend frequent monitoring of serum phosphate during early period of DKA, particularly in malnourished children, and its normalization in case of severe hypophosphatemia.

A comparative study of sexual dysfunction in schizophrenia patients taking aripiprazole versus risperidone

BACKGROUND

Sexual dysfunction due to antipsychotics is a significant problem encountered with first-generation antipsychotics. Even the second-generation antipsychotics like risperidone are not free of sexual dysfunction due to its D2 blocking properties leading to hyperprolactinaemia. Newer antipsychotic aripiprazole, partial dopamine agonist, with neutral effect on prolactin level or even decreasing it, is associated with avoidance of sexual dysfunction.

OBJECTIVES

To assess the effect of risperidone and aripiprazole on sexual function of schizophrenic patients.

METHODS

This was an open-label, cross-sectional, observational study conducted at College of Medical Sciences, Bharatpur. Schizophrenic patients attending OPD and inpatient, taking risperidone or aripiprazole for at least two months were included in this study. Forty one patients, without chronic medical illness and sexual dysfunction before starting drugs, with informed consent were studied during Jan 2012 and Aug 2012.

RESULTS

Changes in sexual activity was found in 11(55%) of those taking risperidone while, only 3(14.3%) had any kind of sexual difficulty. This was statistically significant (p=0.006). Majority, 92.7% of the patients did not report about changes in sexual activity spontaneously.

CONCLUSION

Sexual dysfunction was statistically significantly higher in those taking risperidone. Prevalence of sexual dysfunction was low with aripiprazole. Except those having poor sexual functions due to the drugs, the majority had to be specifically inquired about the effects of drug on sex life.

A study of clinico-demographic profile of patients with dissociative disorder

Objectives To study the clinical and socio demographic profile of patients with dissociative disorder and their comorbid mental illness. Materials and methods Fifty-one patients of dissociative disorder presenting to emergency and outpatient department of Psychiatry at College of Medical Sciences Teaching Hospital during the period from Jan to March 2012 were included. International statistical classification of diseases and related health problems tenth edition, diagnostic criteria for research (ICD-10, DCR) was used. Results Out of 51 patients, the majority 24 (47.1%), were in the age group 15-29. However the age of presentation ranged from 9-45 years. The females were more, 44 (86.3%) as compared to males 7 (13.7%). The majority of patients had low level of education with none of the patients having education above intermediate level. The majority of patients, 27(52.9%) belonged to lower middle class. 49% of the patients presented with dissociative convulsions, 15.7% with dissociative motor disorders, 15.7% with dissociative stupor, 11.8% with dissociative anesthesia and sensory loss and 7.8% with trance and possession disorder. Depressive illness was found co-morbid with dissociative disorder in 33.3%, borderline personality disorder in 9.8% and histrionic personality disorder in 7.8%. There was history of immediate stressful events that supposedly precipitated the event in 76.5%. Conclusion Dissociative disorder mainly affects young female of lower socio-economic and educational status with history of immediate stressful life events precipitating the illness. Journal of College of Medical Sciences-Nepal, 2012, Vol-8, No-3, 30-35 DOI: http://dx.doi.org/10.3126/jcmsn.v8i3.8683

Ethical tradeoffs in trial design: case study of an HPV vaccine trial in HIV-infected adolescent girls in lower income settings

The Declaration of Helsinki and the Council of the International Organization of Medical Sciences provide guidance on standards of care and prevention in clinical trials. In the current and increasingly challenging research environment, the ethical status of a trial design depends not only on protection of participants, but also on social value, feasibility, and scientific validity. Using the example of a study assessing efficacy of a vaccine to prevent human papilloma virus in HIV-1 infected adolescent girls in low resource countries without access to the vaccine, we compare several trial designs which rank lower on some criteria and higher on others, giving rise to difficult trade-offs. This case demonstrates the need for developing more nuanced guidance documents to help researchers balance these often conflicting criteria.

Probable Phaeoacremonium parasiticum as a cause of cavitary native lung nodules after single lung transplantation

Lung nodules after lung transplantation most often represent infection or post-transplant lymphoproliferative disorder in the allograft. Conversely, native lung nodules in single lung transplant recipients are more likely to be bronchogenic carcinoma. We present a patient who developed native lung cavitary nodules. Although malignancy was anticipated, evaluation revealed probable Phaeoacremonium parasiticum infection. Phaeoacremonium parasiticum is a dematiaceous fungus first described as a cause of soft tissue infection in a renal transplant patient. Lung nodules have not been previously described and this is the first case, to our knowledge, of P. parasiticum identified after lung transplantation.

Antioxidant and hepatoprotective action of Asparagus racemosus Willd. root extracts

The antioxidant activities of the crude hydro-alcoholic extract (CE) and its four fractions viz. methanol (MF), ethyl acetate (EF), n-Butanol (BF), and precipitated aqueous (PAF) of A.racemosus roots tested decreased in the order of EF > MF > CE > BF > PAF when investigated by DPPH free radical scavenging assay. Under iron induced lipid peroxidation almost similar results were observed except that the activity was more in PAF than BF. Hepatoprotective activity of the extracts was also demonstrable in vivo by the inhibition of-CCl4 induced formation of lipid peroxides in the liver of rats by pretreatment with the extracts. CCl4-induced hepatotoxicity in rats, as judged by the raised serum enzymes viz. glutamate oxaloacetate transaminase, glutamate pyruvate transaminase, alkaline phosphatase and total and direct bilirubin as well as oxidant enzyme viz. malon dialdehyde were prevented, while antioxidant enzymes viz. superoxide dismutase, reduced glutathione and catalase were elevated by pretreatment with the extracts, demonstrating the potent hepatoprotective action of the roots of A. racemosus.

Study of psychiatric disorders among nepalese patients working abroad and their family members

This study was carried out among the patients working abroad and their family members, having various psychiatric disorders. 80 patients attending psychiatry OPD between the age of 15 to 65 years both male and female in the period of July 2009 to July 2010 were included. The results were tabulated as per the diagnostic criteria of International Classification of Diseases (ICD-10). Out of total 80 patients, 41 were males and 39 were females, whose husbands were working abroad. 30 cases were of depression,out of which 16 were males and 14 were females.18 cases were having anxiety disorders out of which 5 were males and 13 were females. 12 cases were suffering from psychotic disorders out of which 10 were males and 2 were females.7 cases were having dissociative disorders with 1 male and 6 females.4 cases were having somatoform disorders with 2 males and 2 females.1 male and 1 female were suffering from mania.1 male and 1 female were suffering from bipolar affective disorder. 2 males were alcohol dependent and 2 males were having obsessive compulsive disorder. 1 male was having organic psychosis. Journal of College of Medical Sciences-Nepal,2011,Vol-6,No-4, 1-6 DOI: http://dx.doi.org/10.3126/jcmsn.v6i4.6718

A comparision of efficacy of risperidone and olanzapine in schizophrenia patients

Schizophrenia is a leading worldwide mental health problem. It is also one of the common and challenging problems in Nepal. Risperidone and olanzapine is one of the major antipsychotic drug used for schizophrenia patients, however their efficacy is not compared in Nepal.To assess the efficacy of risperidone and olanzapine in schizophrenia patients in Nepalese context. An open-label, randomized, comparative, prospective study was done for 6 weeks. Total of 63 patients attending Psychiatry OPD in Jan to July 2008 at TUTH who could be available for close follow up were enrolled with consent. Risperidone was given in dose of 3-6 mg and Olanzapine in the dose of 15-20 mg per day. Efficacy and tolerability was assessed using PANSS, CGI, and UKU side-effect checklist. Both groups showed improvement in the entire positive, negative and general psychopathology subscales without significant difference in the two groups. Regarding tolerability, olanzapine was found to have significant sedation, weight gain while with risperidone extrapyramidal side-effects, palpitations, sexual side-effects were significant. Risperidone and olanzapine both are efficacious in the treatment of schizophrenia. Both the drugs have their own side-effects. Long-term efficacy and tolerability needs to be studied. As it has been seen in the ongoing studies, long-term use and side-effect profile, drop-out rates and the increase in metabolic syndromes need more consideration.DOI: http://dx.doi.org/10.3126/jcmsn.v7i3.6706 Journal of College of Medical Sciences-Nepal, 2011, Vol-7, No-3, 29-35

Solitary fibrous tumour presenting as a pedunculated lung mass with associated lung atresia: report of a case

This case report describes a solitary fibrous tumour presenting as a pedunculated mass arising from an almost completely atretic right middle lobe of lung. The intraoperative findings and pathologic diagnostic criteria used are described. To our knowledge, this is the first case report of a solitary fibrous tumour associated with partial lung atresia.

Photometric calibration for quantitative spectral microscopy under transmitted illumination

Over the past decade, there have been significant developments in the mechanisms for examination of biological and material samples. These developments exploit techniques in light microscopy to elucidate specific parts of cells and tissues, as well as inorganic particles. In recent years, spectral microscopy has become more prevalent for characterization of samples. Simultaneously, sensor technology has progressed as well and modern charge-coupled devices (CCD) cameras are now capable of achieving high spatial resolution and high sensitivity measurements of signals in the optical microscope. One major impediment in obtaining absolute quantitative information of imaged samples is the lack of automated photometric calibration mechanisms for spectral microscopes. In this paper, we present a methodology for achieving photometric calibration of an automated spectral imaging system targeted towards examination of biological samples. By acquiring spatial and spectral data simultaneously, spectral imaging allows one to exploit physical connections between a particle's morphology and its characteristic response to the optical spectrum. In composite biological material, the interpretation of the spectra is a complicated problem. This is because any light source and charge-coupled device camera used for data acquisition does not have a uniform illumination spectra and quantum efficiency, respectively, across the emitted light spectra. To balance the spectral response across individual wavelengths, our method modulates the exposure duration for the charge-coupled device camera during image acquisition. We present an image similarity based method to calibrate the system. Experiments to test the effectiveness of the calibration method under the various image similarity metrics are presented along with results to show the calibrated system's ability to accurately measure spectra based on the measured transmission profiles of optical filters.

Current trends in cell therapy for pediatric acquired brain injury

Pediatric traumatic brain injury (TBI) represents a major burden on healthcare worldwide. In the United States, TBI accounts for 435000 Emergency Department visits, 37000 hospital admissions, and approximately 2500 deaths each year. While aggressive early rehabilitation has shown some functional improvement, the acute care of TBI with focus on controlling intracranial pressure while maintaining adequate cerebral perfusion has not shown the ability to reverse neuronal injury on either a cellular or subcellular level. Preliminary investigation into the use of cell therapeutics has shown promise for the treatment of TBI in animal models. While progenitor cells may potentially act via altering the intracerebral milieu (modulation of inflammatory response and trophic factor secretion), the exact mechanism remains controversial. In addition, traditional delivery vehicles (intravenous, intra-arterial, intrathecal injections, and direct implantation) have shown significant barriers to translation coupled with inconsistent results. Therefore, investigation into novel delivery vehicles such as nanofiber scaffolds and hydrogels could enhance transplant cell viability, engraftment, and efficacy. Overall, a large amount of preclinical work remains to clearly define optimal progenitor cell type, dosage, and delivery vehicle. The optimal therapeutic benefit may be seen using a combination of therapies (controlled hypothermia, hypertonic therapy, and/or cellular therapeutics) to attack the complex pathophysiology of TBI at multiple points.

An optimised radial basis function algorithm for fast non-rigid registration of medical images

The registration of multi-modal medical image data is important in the fields of image guided surgery and computer aided medical diagnosis. Registration accuracy is of utmost importance in both fields, however in the former, the speed of registration is equally important. In this paper, we present a point-based 'fast' non-rigid registration algorithm which exhibits significant speedups as compared to the non-optimised equivalent algorithm. Additionally, we make use of the parallel nature of the graphics processing unit (GPU) of the video adapter card of a standard PC to gain further speedups. The algorithm achieved sub-second performance when tested on the registration of MR with CT image data of size 256(3).

Classification of parenchymal abnormality in scleroderma lung using a novel approach to denoise images collected via a multicenter study

RATIONALE AND OBJECTIVES

Computerized classification techniques have been developed to offer accurate and robust pattern recognition in interstitial lung disease using texture features. However, these techniques still present challenges when analyzing computed tomographic (CT) image data from multiprotocols because of disparate acquisition protocols or from standardized, multicenter clinical trials because of noise variability. Our objective is to investigate the utility of denoising thin section CT image data to improve the classification of scleroderma disease patterns. The patterns are lung fibrosis (LF), groundglass (GG), honeycomb (HC), or normal lung (NL) within small regions of interest (ROIs).

METHODS

High-resolution CT images were scanned in a multicenter clinical trial for the Scleroderma Lung Study. A thoracic radiologist contoured a training set (38 patients) consisting of 148 ROIs with 46 LF, 85 GG, 4 HC, and 13 NL patterns and contoured a test set (33 new patients) consisting of 132 ROIs with 44 LF, 72 GG, 4 HC, and 12 NL patterns. The corresponding CT slices of a contoured ROI were denoised using Aujol's mathematic partial differential equation algorithm. The algorithm's noise parameter was estimated as the standard deviation of grey-level signal (in Hounsfield units) in a homogeneous, non-lung region: the aorta. Within each contoured ROI, every pixel within a 4 x 4 neighborhood was sampled (4 x 4 grid sampling). All sampled pixels from a contoured ROI were assumed to be the same disease pattern as labeled by the radiologist. 5,690 pixels (3,009 LF, 1,994 GG, 348 HC, and 339 NL) and 5,045 pixels (2,665 LF, 1,753 GG, 291 HC, and 336 NL) were sampled in training and test sets, respectively. Next, 58 texture features from the original and denoised image were calculated for each pixel. Using a multinomial logistic model, subsets of features (one from original and another from denoised images) were selected to classify disease patterns. Finally, pixels were classified into disease patterns using a support vector machine procedure.

RESULTS

From the training set, multinomial logistic model selected 45 features from the original images and 38 features from denoised images to classify disease patterns. Using the test set, the overall pixel classification rate by SVM increased from 87.8% to 89.5% with denoising. The specific classification rates (original/denoised) were 96.3/96.4% for LF, 88.8/89.4% for GG, 21.3/28.9% for HC, and 73.5/88.4% for NL. Denoising significantly improved the NL and overall classification rates (P = .037 and P = .047 respectively) at ROI level.

CONCLUSIONS

Analyzing multicenter data using a denoising approach led to more parsimonious classification models with increasing accuracy. This approach offers a novel alternate classification strategy for heterogeneous technical and disease components. Furthermore, the model offers the potential to discriminate the multiple patterns of scleroderma disease correctly.

Vascular endothelial growth factor is up-regulated after status epilepticus and protects against seizure-induced neuronal loss in hippocampus

Vascular endothelial growth factor (VEGF) is a protein factor which has been found to play a significant role in both normal and pathological states. Its role as an angiogenic factor is well-established. More recently, VEGF has been shown to protect neurons from cell death both in vivo and in vitro. While VEGF's potential as a protective factor has been demonstrated in hypoxia-ischemia, in vitro excitotoxicity, and motor neuron degeneration, its role in seizure-induced cell loss has received little attention. A potential role in seizures is suggested by Newton et al.'s [Newton SS, Collier EF, Hunsberger J, Adams D, Terwilliger R, Selvanayagam E, Duman RS (2003) Gene profile of electroconvulsive seizures: Induction of neurotrophic and angiogenic factors. J Neurosci 23:10841-10851] finding that VEGF mRNA increases in areas of the brain that are susceptible to cell loss after electroconvulsive-shock induced seizures. Because a linear relationship does not always exist between expression of mRNA and protein, we investigated whether VEGF protein expression increased after pilocarpine-induced status epilepticus. In addition, we administered exogenous VEGF in one experiment and blocked endogenous VEGF in another to determine whether VEGF exerts a neuroprotective effect against status epilepticus-induced cell loss in one vulnerable brain region, the rat hippocampus. Our data revealed that VEGF is dramatically up-regulated in neurons and glia in hippocampus, thalamus, amygdala, and neocortex 24 h after status epilepticus. VEGF induced significant preservation of hippocampal neurons, suggesting that VEGF may play a neuroprotective role following status epilepticus.

CAD in clinical trials: Current role and architectural requirements

Computer-aided diagnosis (CAD) technology is becoming an important tool to assess treatment response in clinical trials. However, CAD software alone is not sufficient to conduct an imaging-based clinical trial. There are a number of architectural requirements such as image receive (from multiple field sites), a database for storing quantitative measures, and data mining and reporting capabilities. In this paper we describe the architectural requirements to incorporate CAD into clinical trials and illustrate their functionality in therapeutic trials for emphysema.