United States

Background:
Unintended perioperative hypothermia, defined as having a core-body temperature less than 36 degrees Celsius, occurs in 78.6 % of patients undergoing general anesthesia. Additionally, it is also seen post-operatively in the SICU as well. Concurrently, peri and postoperative hypothermia is also associated with higher rates of infection, increased recovery time, cardiovascular diseases, perioperative hemorrhage, and impairment of drug metabolism. Therefore, it is crucial to limit the incidence of peri and postoperative hypothermia because it is both adjustable and advantageous for the patient. Doing so limits postoperative complications and future surgical interventions. The research goal was to determine the efficacy of using either a water-circulating device or a forced air warming system maintaining both peri/postoperative normothermia during thoracic and abdominal surgeries.

Methods:
A systematic review of randomized controlled trials and non-randomized studies addressing the efficacy of surgical warming systems was conducted. The impact of a water circulating device and a forced air warming system on maintaining peri and postoperative normothermia during abdominal and thoracic surgical procedures were analyzed.

Results:
The initial search of databases returned a total of 28 publications. Five total randomized controlled studies and non-randomized studies were included and analyzed in this review. There was a statistically significant difference in mean core body temperature in patient’s using the water-circulating device when compared to the forced air warming system during thoracic and abdominal procedures perioperatively in both the randomized controlled studies and non-randomized studies, mean difference of 0.45, p=0.0002, 95% CI [0.21,0.69] and mean difference of 0.47, p=0.001, 95% CI [0.18,0.75], respectively. There was not a statistically significant difference in mean core body temperature in patient’s using the water-circulating device when compared to the forced air warming system during thoracic and abdominal procedures postoperatively in the randomized controlled studies, mean difference of 0.41, p=0.34, 95% CI [-1.08,1.33]. There was a slight difference in the maintenance of normothermia postoperatively in the nonrandomized studies, mean difference of 0.89, p=0.02, 95% CI [0.12,1.65].

Conclusion
The investigated water warming system results in better maintenance of intraoperative normothermia than routine air forced warming applied to the upper and lower body.


AMA Research Challenge 2023

Water Circulating Device versus Forced Air Warming System in Prevention of Hypothermia during Thoracic and Abdominal Surgeries: a Meta Analysis

poster

Welcome to the **largest national, multi-specialty research** event featuring research from nearly 700 medical students, residents, fellows, and international medical graduates.

Use the buttons below or navigation menu to access the event.
 


[![](https://assets.underline.io/uploads/markdown_image/1/image/3e33a8c754cc49610b30950617d813e7.png)](https://underline.io/events/434/sessions?searchGroup=all)
 
[![](https://assets.underline.io/uploads/markdown_image/1/image/551404d429c4e274f9a54cbdd7081918.png)](https://underline.io/events/434/posters?searchGroup=all)
 
[![](https://assets.underline.io/uploads/markdown_image/1/image/677d92f566b880cebd36905fc738fc10.png)](https://underline.io/events/434/lounge)
 
[![](https://assets.underline.io/uploads/markdown_image/1/image/c7392833c7261c3874c5b43fa2f4df19.png)](https://underline.io/events/434/help-desk)
 

#### Event Details

The 2023 American Medical Association Research Challenge includes a poster symposium hall and a semifinals hall with the top scored research. **Log in at any time throughout the event to:**

* **View posters and presentations** on a variety of topics and specialties
* **Score posters in the semifinals** to help decide the top five finalists (AMA member exclusive opportunity)
* **Connect with participants** and provide feedback to help advance their research
* **Attend education sessions** with physician experts on key research topics

At the conclusion of this event, the AMA will announce the top five finalists who will advance to the AMA Research Challenge finals, present their research to an elite panel of judges, and compete to win a $10,000 grand prize sponsored by Laurel Road. 

### Grand Prize Sponsor

AMA would like to thank Laurel Road for sponsoring a $10,000 grand prize for the winner of the AMA Research Challenge. Laurel Road is not involved in the judging or scoring process to select the winner. The winner will be announced on February 4, 2024 during the AMA Research Challenge finals. Payment of the grand prize will be directly from Laurel Road. See the AMA Research Challenge Official Rules for terms and conditions.

![](https://assets.underline.io/uploads/markdown_image/1/image/611e331d4a0eba0920f240cfc04b4d77.png)

**There is no registration fee for this event! **

Register to explore research in a variety of topics. AMA members get exclusive access to score posters in the semifinals.

**Please use this link [here](https://www.ama-assn.org/about/events/ama-research-challenge) to register for free.**

Registration Is Required

Join the AMA Research Challenge poster symposium and semifinals to explore top research posters, score posters in the semifinals (an AMA member exclusive opportunity) and attend education sessions with experienced physicians to learn tips to advance your research and career. 

Background: In the last 20 years, African Americans and Hispanics/Latinos have been less likely to receive treatment of any analgesia, including opioids as compared to Whites/Caucasians. Surgery and anesthesia are critical healthcare services and are the mainstay treatment for many pathologies, however, postoperative pain is often a significant concern for surgical patients. Poorly controlled acute postoperative pain is associated with diminished function and mobility, delayed recovery, prolonged opioid use, and higher healthcare costs. Although evidence of disparities in the treatment of pain exists, studies on this topic are limited.
Methods: A systematic review and meta- analysis of cohort studies and cross-sectional analysis of studies published in PubMed, Embase, and Scopus in the last 10 years examining disparities in perioperative pain treatment specifically the use of regional anesthesia and opioid use measured in milligrams of morphine equivalents (MME). Articles with sample populations from the United States examining were included, data from Obstetric, Pediatric (<18 years old), and simulation cases were excluded.
Results: The initial search yielded 640 articles, after abstract and full-text screening 5 studies met the inclusion criteria. The types of surgery included in the review were mastectomy, thoracic surgery, and abdominal surgery. The odds of receiving regional anesthesia of minority populations as compared to whites found to be as follows with: Blacks 0.78 [95% CI: 0.73- 0.82]P<0.00001 and I2 =97%, Asian 0.58[95% CI: 0.54-0.63] ]P<0.00001 and I2 =98%, other
Ó 2023 American Medical Association. All rights reserved.
0.85[95% CI: 0.75-0.96] P=0.83 and I2=0%, Native Hawaiian 0.85[95% CI: 0.63-1.14]P=0.28, Native American 0.93[95% CI: 0.71-1.23] P<0.62. Studies had a significant heterogeneity in reporting opioid consumption; thus, meta-analysis was not feasible. However, some studies did show differences in opioid prescription among minority groups showing the need for more standardized research in the area.
Conclusion: Analysis of existing data demonstrates that overall self-identified minority individuals had lower odds of receiving regional anesthesia for pain control as compared to white/Caucasian patients undergoing the same procedures; thus, highlighting a disparity in acute perioperative pain control The sparse number of available studies in the literature focusing on disparities in acute perioperative pain control poses a challenge to accurate evaluation. The high heterogeneity amongst the studies also limits the strength of evidence. In light of the paltry reporting of disparities in peri-operative pain control, more studies are needed to identify the true nature and size of the underlying issue so the root cause may be elicited and corrected in order to improve health equity.

Disparities in Perioperative Pain Control: A Systematic Review and Meta- Analysis

Background:
Sex differences in cardiac arrhythmias are well-established and partly attributed to sex hormones. We aimed to explore the prevalence of arrhythmias in transgender and nonbinary (TGNB) adults.
Methods:
This cross-sectional study utilized patient electronic medical records from a single communityhealthcare center specializing in TGNB care. Adults aged >18 years with >2 medical visitsbetween January 1, 2010, and December 31, 2021, were categorized into self-reported gender groups as TGNB (transgender man[TGM], transgender woman[TGW], nonbinary–assigned male at birth, nonbinary–assigned female at birth) and cisgender (cisgender man[CisM] or cisgender woman[CisW]). We categorized arrhythmias as atrial, ventricular, or other. Descriptive statistics
characterized the prevalence of arrhythmias by gender group. Age- and race-adjusted Firth-type logistic regression models compared TGNB patients to CisM and CisW. The prevalence of arrhythmias was also descriptively explored in nonbinary people and in TGNB people with a gender-affirming hormone therapy (GAHT) prescription .
Results:
Among 49,862 adults, 7121 (14%) identified as TGNB persons. Participants were young (median age 28 years-old) and prevalence of arrhythmias was low (0.7-1.4% in NB persons, 1.4-1.5% in TG persons). Adjusting for age and race, TGM and TGW had a similar risk of arrhythmias compared to CisM (TGW: OR=0.89 (0.63-1.24), p=0.52; TGM: OR=1.17 (0.82-1.62), p=0.37), but statistically significantly higher odds of arrhythmias compared to CisW (TGW: OR=1.65 (1.13-2.34), p=0.01; TGM: OR=2.15 (1.48-3.04), p<0.01). Prevalence of arrhythmias appeared similar among TGNB adults who used GAHT and those who did not (1.5% vs 1.9% in TGM, 1.2% vs 2.1% in TGW).
Conclusion:
Further research examining arrhythmias in TGNB patients and across gender minority subgroupsis warranted, including longitudinal studies evaluating the potential impact of GAHT.

Prevalence of Cardiac Arrhythmias in Transgender and Nonbinary Community Adult Health Center Patients

Background
Major depressive disorder is a relatively common comorbidity among patients living with human immunodeficiency virus (PLWH). However, it is not clear if its impact on the outcomes of cardiovascular diseases is modified by other coexisting conditions. We aimed to stratify the differences in outcomes, based on certain high-risk behaviors, between PLWH with and without depression, who have been hospitalized due to acute myocardial infarction (AMI).
Methods
Using the International Classification of Diseases, tenth Revision, Clinical Modification (ICD-10-CM), we queried the national inpatient sample (NIS) database to identify PLWH who have been hospitalized with AMI from 2010 to 2019. Mortality rate, frequency of home disposition (HD), length of hospital stay (LOS), and total hospital charge (THC) were compared between PLWH with AMI and depression and those without depression. A similar comparison was stratified based on co-existence of sleep disorder (SD), drug abuse (DA), and alcohol dependence (AD).
Results
Data of 1,816,567 admission cases were identified for PLWH, from which 1.8% of patients had a discharge diagnosis of AMI. Of the 29,203 admissions for PLWH with AMI, 10.8% had a diagnosis of depression, 2.7% with a diagnosis of a SD, 44.7% with DA, and 3.7% with AD. Overall, 9.4% of PLWH with AMI died during the hospital stay. Co-existence of depression was associated with a significantly lower mortality rate compared to those without depression (4.9% vs. 9.9%, p<0.0001). Similarly, HD was more frequent among those with depression than those without depression (61.7% vs. 56.9%, p=0.02). The presence of depression was associated with a significantly shorter LOS (6.2 days vs. 7.8 days, p=0.003) and lower THC ($94,385.2 vs. $114,808.7, p=0.01). Among PLWH with AMI and depression, the co-existence of SD was associated with a lower prevalence of HD while co-existence of DA was associated with a higher frequency of HD. Co-existence of DA was also associated with a shorter LOS and lower THC among the cohorts of PLWH and AMI with and without depression. Such a pattern was not significantly different between the same cohort based on AD.
Conclusion
PLWH who are hospitalized due to AMI have a lower mortality rate in the presence of depression, sleep disorder, drug abuse, and alcohol dependence. However, co-existence of these comorbidities is associated with variable impact on the chance of home disposition, length of stay, and hospital charge.

Paradoxical Effect of Depression on the Outcomes of Patients Living with Human Immunodeficiency Virus (PLWH) who were Hospitalized due to Acute Myocardial Infarction: A Retrospective Analysis of the National Inpatient Sample Database Between 2010 and 2019

Background: Bariatric surgery (BS) has proved to reduce comorbidity burden among patients with established cardiovascular diseases (CVD). However, its impact on mortality and hospital outcomes remains to be investigated among this population of patients.
Methods: National Inpatient Sample (NIS) database was queried to identify admission cases with CVD during 2019. Mortality rate and hospital outcomes were compared according to the types of CVD and history of BS.
Results: Out of 7,803,805 hospitalizations during 2019, data of 38,354 patients with a history of BS was stratified according to the types of CVD (Table1). History of BS was associated with lower mortality among all CVD subtypes. However, its impact on reducing the length of stay was only statistically significant among established cases of heart failure, atrial fibrillation, peripheral vascular diseases, and aortic dissection/aneurysm. Regardless, previous BS was not associated with lower cost of hospitalization among patients admitted with CVD. Among BS procedures, sleeve gastrectomy played a more beneficial role than gastric bypass among CVD patients.
Conclusion: Bariatric surgery is associated with reduced mortality and length of hospitalization among patients with established CVD with sleeve gastrectomy having a more desirable outcome. However, its impact on acute cases of CVD such as myocardial infarction and cerebrovascular accident remains unclear. 


Bariatric Surgery is Associated with Better Outcomes Among Hospitalized Patients with Established Cardiovascular Diseases in the United States: An Insight from the National Inpatient Sample Data 2019

Background: Sleep disorder (SD) is a common condition in patients suffering cardiovascular conditions. However, its impact on the outcome of certain cardiac events and in the context of co-existing depression has not been studied.
Hypothesis: We wanted to investigate if SD and associated comorbidities affect the outcomes of hospitalized patients with acute myocardial infarction (AMI).
Methods: Using the International Classification of Diseases, tenth revision (ICD-10) codes, we identified admission cases with AMI and SD from the national inpatient sample dataset from 2016 to 2019. Related comorbidities such as depression, drug abuse (DA), and alcohol-related disorders (AD) were also identified using the same approach. Weighted data was analyzed to cross tabulate the mortality rate and frequency of home disposition according to the SD and related comorbidities. A student t-test was also performed to compare the length of hospital stay and total hospital charge between different cohorts of AMI patients.
Results: Data pertinent to 4,483,509 admission cases with AMI was analyzed from 2016 to 2019. Of this, 507,825 patients (11.3%) had a diagnosis of SD, 426,350 patients had depression (9.5%), 919,645 patients (20.5%) had DA, and 174,395 patients (3.9%) had AD. Overall, 362,290 patients (8.1%) died. Mortality rate was significantly higher among AMI patients without SD than in those with SD (8.5% vs. 5.1%, p<0.0001). Among AMI patients with SD, mortality rate and cost of hospitalization was significantly higher in those without depression than in those with depression. On the contrary, AMI patients with SD and depression had a longer LOS and were less likely to be discharged home than AMI patients with SD but without depression. While co-existing DA had a similar effect on these outcome measures as depression, the presence of AD did not affect the mortality rate but reversed other endpoints in AMI patients with SD.
Conclusion: Co-existence of sleep disorder and related comorbidities (depression, drug abuse, and alcohol-related disorder) among patients hospitalized with AMI variably affects the length of stay, hospital charge, destination outcome, and mortality rate. Such paradoxical role play might highlight the variation in other risky behaviors or optimized management among hospitalized AMI patients.

Association of Sleep Disorder with Hospital Outcomes among Hospitalized Patients with Acute Myocardial Infarction in the United States from 2016 to 2019

Introduction
In the thrombolytic era, WHO defined a MI as having 2 out of 3 features of chest pain, ST elevation, and enzyme elevation. These definitions have evolved with the advent of coronary angiography, myocardial imaging, and highly sensitive cardiac enzymes. It is unclear about the proportion of MI patients who have these features in a contemporary setting. We analyzed the MUSC STEMI-Activation database to characterize the presentations of STEMI during 2009-2022.
Method
Medical record of 1113 STEMI activation from 2009-2022 was analyzed using these definitions: 
1) Clinical STEMI- chest pain, diaphoresis, acute dyspnea, and/or cardiac arrest. 
2) EKG STEMI- ST elevation on EKG, new LBBB, reciprocal changes of posterior MI
3) Enzymatic STEMI- rise and fall of hsTroponin (> 10,000 units)
4) Angiographic STEMI-acute culprit vessel identified on angiogram
5) All four features of STEMI-1+2+3+4
Result
There were 1113 consecutive patients identified in the database. The average age was 60 +12.8 years , and they were 70.8% male. Risk factors included hypertension 69.3%, smoking 58.5%, high cholesterol 57.0%, diabetes 30.0%, and chronic kidney disease 10.6%. 
Of the 1113 STEMI activations, 42 (3.8%) patients did not go to the Cath lab (STEMI inactivated). No culprit vessel was detected in 243 patients (22.6%). Of the 1071 patients that went to the Cath lab, angiographic STEMI was detected in 828 patients (77.3%). The culprit vessels were LAD (41.1%), RCA (40.7%), LCX (11.4%), and others (6.8 %). 
Using Angiographic STEMI as the gold standard (n=828), Clinical STEMI was seen in 94.6%, Enzymatic STEMI in 55.8%, and EKG STEMI in 93.0% of this patient population. WHO-defined MI ( 2/3 criteria ) was noted in 776 patients (93.7%). All 4 features of STEMI were noted in only 50.7%.
Conclusion
After STEMI activation, Angiographic STEMI was noted in only 77.3% of cases. WHO defined MI was seen in 93.7% of patients with angiographic STEMI, and all 4 features were seen in 50.7% of patients. Clinical and EKG criteria appeared to be the best predictor of angiographic STEMI. 


Contemporary Patterns of Myocardial Infarction in Patients Presenting with ST- Elevation Myocardial Infarction

**Scoring is only possible in the semifinals hall**

**Abstract:**



Primary Care Intervention Improves Hypertension Outcomes in Urban Indian Slums

Nocturia, defined as waking to void during the hours of intended sleep, is a prevalent urologic complaint associated with non-urological conditions in both sexes. Hypertension (HTN) is among the most common associated condition in adults. Accordingly, nocturia has been proposed as a useful method to screen for HTN. Although nocturia is common in children, the relationship between blood pressure (BP) and nocturia has not been studied in the pediatric population. The objectives of this study were to determine the relation between HTN and nocturia in adolescents and to compare self-reported frequency to nocturnal voiding-diary frequencies. 100 patients aged 10-18 years were recruited. Demographic data and conventional BPs were measured. BP elevation and HTN stages were determined according to American Academy of Pediatrics height and sex-based tables. Urine collection containers were provided along with standardized nocturnal voiding diary that include times and volumes of urination voids. Voiding-diary data were collected via follow-up phone-call. Nocturia was predefined as >1 voids recorded by voiding diary. Univariate analyses and logistic regression were used to predict the dichotomous variable of nocturia and the dichotomous variable of BP elevation. Thirty-four study participants had HTN. In patients with nocturia, 17 (37.8%) had normal BP and 28 (62.2%) had elevated BP. While 37% patients self-reported waking up to urinate, voiding diaries showed 45% had >1 voids. Self-report and voiding frequencies were significantly correlated (r=.84, p<.05). On univariate analysis, patients with BP elevation were more likely to have nocturia by voiding diary (OR 13.5, 95% CI: 4.8, 38.1) and by self-report (OR 7.1, 95% CI: 3.2, 16.0). On multivariate analysis after adjusting for sex and obesity, the ORs increased (OR 26.2, 95% CI: 6.5, 106.0). Patient with nocturia were more likely to have BP elevation by voiding diary (OR 13.3, CI 4.8, 13.1) and by self-report (OR 11.3, 95% CI: 2.8, 45.4). On multivariate analysis, the likelihood of having BP elevation increased by voiding diary (OR 26.3, 6.5, 106.4) after adjusting for sex and obesity, whereas it was unchanged for nocturia by self-report (OR 8.1,95% CI: 3.2, 20.5). Our data suggest nocturia is common and is strongly related to BP elevation in adolescents. Since there is much lower prevalence of comorbid conditions such as diabetes, urological conditions, and congestive heart failure that are known to cause nocturia in adolescents as compared to adults, fewer confounding variables would strengthen the magnitude of the BP and nocturia link. Self-reported and voiding frequencies were also found to be significantly correlated. The prevalence of nocturia may also be underestimated in the pediatric population. Study findings suggest that history of nocturia can be an inexpensive and simple method of identifying adolescents at higher risk of having HTN.

Relation Between Nocturia and Blood Pressure Elevation in Adolescents

Background: While abnormalities in cardiac, respiratory, and autonomic function are each associated with seizures and sudden death, there is a great need for the development of a robust recording system to capture the concordance between these multi-system changes. Rare episodic health events are often not captured during inpatient hospital stays and require geographic and financial access. This barrier can result in inconclusive or delayed diagnosis and inappropriate treatments. The Equivital Eq02+ Life Monitor vest includes 2 ECG leads, strain gauge for respiratory amplitude/frequency monitoring, 3-axis accelerometry, temperature, and SpO2 plethysmography. It provides a potential out-of-hospital tool to capture rare health events and simultaneous multi-system parameters. We aimed to develop a protocol that optimized the comfort and signal quality of the vest and a Bluetooth SpO2 watch. 
Methods: Comfort levels of the vest were determined through a survey prior to the start of the study and upon completion of the study. Battery life, (re-) wetting the electrodes, fitting of the vest, and Bluetooth connectivity were all parameters that were tested to determine optimal signal quality and a protocol for fitting of the vest. 
Results: We tested the feasibility and comfort while wearing the Equivital vest in healthy adults (n=20). 80% of the subjects said they would be willing to wear the vest again, and 67% said they would be willing to wear it for ≥3 days if medically necessary. We tested the signal quality during specific physiological states and across multiple days. At each state, almost all QRS complexes were surrounded by a detected P and T wave. This enabled us to quantify standard ECG metrics of cardiac conduction and repolarization. There were no differences in signal quality when the person wore a vest that fit comfortably vs optimal fit according to the protocol. Additionally, there were no differences in signal quality when the person dampened the electrodes multiple times a day vs at the start of the study.
Conclusions: Feasibility studies indicate that the Equivital vest is comfortable and yields multi-system recordings of high signal quality. This vest may provide a future recording tool to improve access to health care and improve diagnostics.


Premium content

Water Circulating Device versus Forced Air Warming System in Prevention of Hypothermia during Thoracic and Abdominal Surgeries: a Meta Analysis

Next from AMA Research Challenge 2023

Disparities in Perioperative Pain Control: A Systematic Review and Meta- Analysis