External Chest Research Articles

Analysis of factors affecting in-hospital emergency response capability based on objective assessment

To analyze the factors affecting the quality of cardiopulmonary resuscitation (CPR) performed by medical staff in hospital and to explore the training methods to enhance their in-hospital emergency response capabilities. A cross-sectional study was conducted, involving medical staff of intensive care unit (ICU) and general internal medicine wards in China-Japan Friendship Hospital in December 2021. The American Heart Association (AHA) resuscitation quality improvement (RQI) model was used to evaluate the skills of the subjects in performing external chest compressions and bag-mask ventilation on adult and infant simulators. While ICU subjects were undergoing RQI model objective assessment, two instructors also provided subjective scoring for their operations. The study compared the differences in RQI model objective assessment scores between ICU and general internal medicine ward subjects, between doctors and nurses, in the RQI model objective scoring for adult and infant resuscitation, in the scoring differences of different positions for chest compressions, and the differences between traditional subjective scoring and RQI objective scoring when ICU subjects were assessed for compression and ventilation. A total of 75 medical staffs were enrolled, consisting of 50 from the ICU (including 24 doctors and 26 nurses) and 25 from the general internal medicine wards (including 10 doctors and 15 nurses). The ICU medical staff's scores for adult resuscitation skills were significantly higher than those of the general internal medicine ward medical staff [adult compression score: 82.5 (66.0, 96.5) vs. 65.0 (52.5, 74.5), adult ventilation score: 82.0 (68.8, 98.0) vs. 61.0 (48.0, 82.0), both P < 0.01]. The nursing group's compression scores for both adult and infant were significantly higher than those of the doctor group [adult compression score: 77.0 (68.5, 89.5) vs. 63.0 (40.8, 90.3), infant compression score: 54.4±25.1 vs. 41.5±18.5, both P < 0.05]. The compression and ventilation scores for the infant were significantly lower than those for adult resuscitation [compression score: 48 (29, 65) vs. 76 (58, 90), ventilation score: 56 (42, 75) vs. 76 (60, 96), both P < 0.01]. When the rescuer was positioned on the right side of the model, the compression score for the adult significantly increased [79.0 (65.0, 92.0) vs. 65.0 (51.3, 77.0), P < 0.05]. The ICU medical staff's traditional subjective scores of compression and ventilation assessments for adult were significantly higher than the RQI model objective scores [adult compression score: 88.8 (79.4, 92.5) vs. 82.5 (66.0, 95.5), adult ventilation score: 95.0 (80.0, 98.1) vs. 82.0 (68.8, 98.0), both P < 0.01]. Rich experience in emergency rescue is related to the improvement of CPR skills, and performing chest compressions from the right side of the adult model is more effective. Objective scoring of resuscitation skills based on the RQI model may more accurately reflect the performance of the trainees.

A comparative study on the protective effects of cuminaldehyde, thymoquinone, and gallic acid against carbon tetrachloride-induced pulmonary and renal toxicity in rats by affecting ROS and NF-κB signaling

CCl4 toxicity is a fatal condition that can cause numerous organ dysfunctions. We evaluated and compared the protective effects of cuminaldehyde (CuA), thymoquinone (TQ), and gallic acid (GA) on CCl4-induced pulmonary and renal toxicity in rats. The impacts of these compounds on CCl4-induced oxidative stress, inflammation, and morphological alterations were examined. The results showed that the compounds under investigation prevented CCl4 from significantly increasing pulmonary and renal lipid peroxidation and NO levels, as well as massively depleting GSH levels and GPX and SOD activities. Moreover, they suppressed the CCl4-induced increase in mucus secretion in the lung and upregulated the gene expression of pulmonary and renal NF-ҡB, iNOS, TNF-α, and COX-2. The heatmap cluster plots showed that GA and TQ had better protective potencies than CuA. The external organ morphology, histopathological results, and chest X-ray analysis confirmed the toxicity of CCl4 and the protective influences of the tested compounds in both the lungs and kidneys of rats. These compounds displayed predicted competitive inhibitory effects on iNOS activity and may block the IL-13α2 receptor, as revealed by molecular docking analysis. Thus, CuA, TQ, and GA, particularly the latter two, are prospective protective compounds against the pulmonary and renal toxicity caused by CCl4.

The Efficiency of the Constraint-Led Approach in Teaching External Chest Compressions to Medical Students

The Efficiency of the Constraint-Led Approach in Teaching External Chest Compressions to Medical Students

The therapeutic value of vacuum external fixation in polytrauma patients with multiple ribs fracture.

Multiple displaced rib fractures often result in a poor prognosis. Open reduction and internal fixation has been shown to provide benefits for patients with displaced rib fractures and flail chest. Nevertheless, for patients who are unwilling or unsuitable for surgery, the therapeutic options are limited. We developed a novel plastic vacuum device for rib fractures external stabilization. This study aims to compare the therapeutic efficacy of this device against a traditional chest strap in polytrauma patients with multiple rib fractures. A retrospective investigation was conducted on polytrauma patients with multiple rib fractures admitted to our trauma center between March 2020 and March 2023. Patients were categorized into two groups: vacuum external fixation and chest strap. Comparative analysis was conducted on baseline parameters, injury characteristics, and clinical outcomes between the two groups. In this study, 54 patients were included, with 28 receiving chest strap and 26 undergoing vacuum external fixation. Results showed that, at 3days and 7days postintervention, the vacuum external fixation group had significantly lower visual analog scale scores during deep breathing and coughing (P< .05). Vacuum external fixation also reduced pleural drainage duration and volume, as well as lowered the risk of pneumonia and other complications (P< .05). Furthermore, the vacuum external fixation group demonstrated notable improvements in vital capacity, tidal volume, blood-gas test results, and a shorter hospital length of stay. According to the study findings, vacuum external fixation appears to offer benefits to patients with multiple rib fractures, potentially reducing the risk of complications and improving overall clinical outcomes.

Computer Tomography (CT)-Based Study to Investigate Feasibility and Efficacy of Thoracoscopic Surgery in the Treatment of Penetrating Chest Wall Tuberculosis.

Chest wall tuberculosis may develop if tuberculous (TB) lesions spread through the chest wall and invade the thoracic cavity. The presence of a mass on the patient's chest wall may be the first indication of TB, and a chest CT scan can help diagnose external penetrating chest wall TB, the incursion of tuberculosis from the lungs into the chest wall. This study examines the safety and efficacy of thoracoscopic-assisted surgery for the treatment of penetrating chest wall tuberculosis as a means of exploring novel concepts of minimally invasive surgery. Our hospital conducted a retrospective study of 25 patients with penetrating chest wall TB who underwent thoracoscopic surgery between January 2020 and June 2021. General demographics, CT scan data linked to surgery, and postoperative patient outcomes were compared between the two groups. The data was also evaluated to determine the range of operation time and the volume of bleeding from different foci in the thoracic cavity. All procedures went well after patients took conventional antituberculosis medication for at least two weeks prior to surgery. CT scans showed that thoracoscopic surgery needed a smaller incision than traditional chest wall TB surgery, with no discernible increase in surgical time. Postoperative tube use, length of hospital stay, and blood loss were all significantly lower than they would have been with conventional surgery. In addition, thoracoscopy was associated with a significantly reduced rate of subsequent treatment. Fibrous plate development and calcification caused the longest operation times in the thoracoscopic surgery group, whereas multiple pleural tuberculomas generated the most hemorrhage. Thoracoscopic surgery usually reveals tuberculous foci hiding in the thoracic cavity. Thethoracic surgery can eliminate the TB focus in the chest wall and intrathoracic while treating penetrating chest wall tuberculosis. The CT scan is a crucial part of the diagnostic process for these patients. Minor surgical trauma, low complication and recurrence rates, and good results. There is a greater distinction between the two surgical approaches for patients with penetrating chest wall TB as opposed to those with basic chest wall tuberculosis.

Development of a real-time RGB-D visual feedback-assisted pulmonary rehabilitation system

BackgroundFollowing surgery, perioperative pulmonary rehabilitation (PR) is important for patients with early-stage lung cancer. However, current inpatient programs are often limited in time and space, and outpatient settings have access barriers. Therefore, we aimed to develop a background-free, zero-contact thoracoabdominal movement-tracking model that is easily set up and incorporated into a pre-existing PR program or extended to home-based rehabilitation and remote monitoring. We validated its effectiveness in providing preclinical real-time RGB-D (colour-depth camera) visual feedback. MethodsTwelve healthy volunteers performed deep breathing exercises following audio instruction for three cycles, followed by audio instruction and real-time visual feedback for another three cycles. In the visual feedback system, we used a RealSense™ D415 camera to capture RGB and depth images for human pose-estimation with Google MediaPipe. Target-tracking regions were defined based on the relative position of detected joints. The processed depth information of the tracking regions was visualised on a screen as a motion bar to provide real-time visual feedback of breathing intensity. Pulmonary function was simultaneously recorded using spirometric measurements, and changes in pulmonary volume were derived from respiratory airflow signals. ResultsOur movement-tracking model showed a very strong correlation (r = 0.90 ± 0.05) between thoracic motion signals and spirometric volume, and a strong correlation (r = 0.73 ± 0.22) between abdominal signals and spirometric volume. Displacement of the chest wall was enhanced by RGB-D visual feedback (23 vs 20 mm, P = 0.034), and accompanied by an increased lung volume (2.58 vs 2.30 L, P = 0.003). ConclusionWe developed an easily implemented thoracoabdominal movement-tracking model and reported the positive impact of real-time RGB-D visual feedback on self-promoted external chest wall expansion, accompanied by increased internal lung volumes. This system can be extended to home-based PR.

A novel CPR-assist device vs. established chest compression techniques in infant CPR: A manikin study

IntroductionGuidelines for infant CPR recommend the two-thumb encircling hands technique (TTT) and the two-finger technique (TFT) for chest compression. Some devices have been designed to assist with infant CPR, but are often not readily available. Syringe plungers may serve as an alternative infant CPR assist device given their availability in most hospitals. In this study, we aimed to determine whether CPR using a syringe plunger could improve CPR quality measurements on the Resusci-Baby manikin compared with traditional methods of infant CPR. MethodsCompression area with a diameter of 1 to 2 cm is recommended in previous infant CPR device researches. In this is a randomized crossover manikin study, we examined the efficacy of the Syringe Plunger Technique (SPT) which uses the plunger of the 20 ml syringe with a 2 cm diameter flat piston, commonly available in hospital, for infant External Chest Compressions (ECC). Participants performed TTT, TFT and SPT ECC on Resusci® Baby QCPR® according to 2020 BLS guidelines. ResultsSixty healthcare providers participated in this project. The median (IQR) ECC depths in the TTT, TFT and SPT in the first minute were 41 mm (40–42), 40 mm (38–41) and 40 mm (39–41), respectively, with p < 0.001. The median (IQR) ECC recoil in the TTT, TFT and SPT groups in the first minute was 15% (1–93), 64% (18–96) and 53% (8–95), respectively, with p = 0.003. The result in the second minute had similar findings. The SPT had the best QCPR score and less fatigue. ConclusionThe performance of chest compression depth and re-rebound ratio was statistically different among the three groups. TTT has good ECC depth and depth accuracy but poor recoil. TFT is the complete opposite. SPT can achieve a depth close to TTT and has a good recoil performance as TFT. Regarding comprehensive performance, SPT obtains the highest QCPR score, and SPT is also less fatigued. SPT may be an effective alternative technique for infant CPR.

Association of Training in Basic Life Support with the Evolution of Cardiopulmonary Resuscitation Performed by Firefighters.

This study aimed to compare the results of professional technical and anthropometric anamnesis data with the transmission of external chest compressions performed by military firefighters at different execution times. The objective was to evaluate the performance and perceived effort of the sequence of external chest compressions performed in two minutes, as well as the evolution of the technique over time. This was a descriptive, correlational study involving adult firefighters who were members of a specific firefighter group, comprising a population of 105 individuals with a voluntary sample of 44 participants. The study used a Bayesian statistical approach to provide probabilistic expressions. The participants had an average work experience of 17 years, an average age of 38.6 years, an average weight of 81.48 kilograms, an average height of 176 centimeters, and an average of 2.5 qualifications. The results indicated that the firefighters performed external chest compressions with excellent technique and a moderate level of perceived effort in a two-minute evaluation. The evaluation of the evolution of the technique over time showed that the participants were able to maintain high-quality compressions for an average of 6 minutes, with a maximum of 20 uninterrupted minutes. The study underscores the critical role of professional firefighters in performing and maintaining high-quality external chest compressions, which has the potential to reduce morbidity and mortality in cases of cardiorespiratory arrest.

Are 4D Motion Sensors Valid and Reliable for Studying Baseball Pitching?

Background: Baseball pitching injuries are on the rise. Inertial measurement units (IMUs) provide immediate feedback to players and coaches, allowing for collection outside of the traditional laboratory setting with real-world application. The 4D Motion system provides kinematics throughout the pitching motion and may be beneficial for individualized programs in the throwing athlete. A systematic analysis of these sensors has not been completed. Purpose: To evaluate the validity of the 4D Motion IMU system for analyzing the baseball pitching motion compared with marker-based motion capture, and evaluate the internal reliability and consistency of the device. Study Design: Controlled laboratory study. Methods: Ten high school pitchers participated in this study (10 male; 9 right-hand dominant; mean age, 16.6 ± 1.3 years; mean body mass index, 24.1 ± 3.9). Participants were simultaneously outfitted with six 4D Motion IMU sensors and retroreflective markers. The pitchers threw fastballs at maximum effort off a mound at the standard height and distance. A comparison was made between the IMUs and corresponding motion capture values for shoulder external rotation, elbow flexion, chest extension, pelvis and chest rotation velocity, and rotation acceleration. Results: Significant differences were found for 5 of 7 metrics analyzed. The IMU overreported most metrics, except for elbow flexion and pelvis rotation angular acceleration, where both positive and negative errors were observed. The root mean square error and percentage errors indicated smaller discrepancies for chest extension (4°± 5°) and pelvis (38 ± 19 deg/s) and chest (96 ± 42 deg/s) rotation velocity, with elbow flexion having the largest variance (21°± 9°). Conclusion: The values of the 4D Motion IMU system should not be considered equivalent when compared with marker-based motion capture studies. The system lacked internal consistency and reliability, with angular velocities being the most consistent. Caution should be used when using the metrics provided by an IMU-based system for individualized monitoring. Clinical Relevance: If found valid and reliable, IMUs could be used for longitudinal workload monitoring, individualized throwing and rehabilitation programs, and ultimately injury prevention. This study demonstrates that the data obtained from a 4D Motion system using Gen 3 sensors are not equivalent to the data obtained from a marker-based motion capture system.

Conhecimento sobre primeiros socorros de servidores de instituições de ensino infanto- juvenil

First aid consists of the first assistance to an accident or sudden illness victim, outside the hospital environment, with or without risk of death. The present study aims to assess the competences and skills related to first aid training with educational workers. This is a pre and post-test experimental research of an educational intervention action carried out by nurses with 31 teachers and 53 employees from three public educational institutions in the city of Ponta Grossa, Parana State, Brazil. The technological application ‘QCPR Learner’ was used to assess practical skills and an instrument for assessing theoretical knowledge, applied before and after the intervention. It was found that 35.7% were successful in the theoretical test and 58% in the practical test before training and that there was a significant improvement in the correct answers in the post-test, when compared to the pre-test, in the themes: cardiorespiratory arrest, external chest compression, bleeding and tooth avulsion (p = 0.000). Regarding the quality of chest compressions before and after the educational intervention, there was a significant improvement in the variables: correct depth, correct frequency and effectiveness of the compressions (p

The influence of pectus excavatum on cardiac kinetics and function in otherwise healthy individuals: A systematic review

BackgroundA number of anterior chest wall deformities, most notably pectus excavatum (PE), may have a detrimental effect on cardiac motion and function. Interpretation of transthoracic echocardiography (TTE) and speckle-tracking echocardiography (STE) results may be hampered by the possible influence of PE on cardiac kinetics. MethodsA comprehensive search of all articles assessing cardiac function in PE individuals was carried out. Inclusion criteria were: 1) individuals aged >10 years; 2) studies providing objective assessment of chest deformity (Haller index). Studies that measured myocardial strain parameters in PE patients were also included. ResultsThe search (EMBASE and Medline) yielded a total of 392 studies, 36 (9.2%) of which removed as duplicates; a further 339 did not meet inclusion criteria. The full-texts of 17 studies were then analyzed. All studies concordantly reported impaired right ventricular volumes and function. With respect to left ventricle (LV), TTE studies uniformly demonstrated a significant impairment in conventional echoDoppler indices in PE individuals, whereas STE studies provided conflicting results. Importantly, LV functional alterations promptly reverted upon surgical correction of chest defect. In subjects with PE of mild-to-moderate severity, we observed that degree of anterior chest wall deformity, as noninvasively assessed by modified Haller index (MHI), was strongly associated with myocardial strain magnitude, in heterogenous cohorts of otherwise healthy PE individuals. ConclusionsClinicians should be aware that in PE individuals, TTE and STE results may not always be indicative of intrinsic myocardial dysfunction, but may be, at least in part, influenced by artifactual and/or external chest shape determinants.

Unexpected carboxyhemoglobin half-life during cardiopulmonary resuscitation: a case report

BackgroundCardiac arrest (CA) following CO poisoning (CO-induced CA) exposes patients to an extremely high risk of mortality and remains challenging to treat effectively. Terminal carboxyhemoglobin elimination half-life (COHbt1/2) is critically affected by ventilation, oxygen therapy, and cardiac output, which are severely affected conditions in cases of CA.Case presentationAsystole occurred in an 18-year-old woman after unintentional exposure to CO in her bathroom. Cardiopulmonary resuscitation (CPR) was started immediately, including mechanical ventilation with a fraction of inspired oxygen (FiO2) of 1.0 and external chest compressions with a LUCAS® device. CPR was stopped after 101 min, as it was unsuccessful. During this period, we calculated a COHbt1/2 of 40.3 min using a single compartmental model.ConclusionsThis result suggests that prolongation of CPR time needed to back COHb at 10%, a level more compatible with successful return of spontaneous circulation (ROSC), could be compatible with a realistic CPR time. Calculating COHbt1/2 during CPR may help with decision-making regarding the optimal duration of resuscitation efforts and further with HBO2 or ECLS. Further evidence-based data are needed to confirm this result.

Virtual Reality Simulator versus Conventional Advanced Life Support Training for Cardiopulmonary Resuscitation Post-Cardiac Surgery: A Randomized Controlled Trial.

External chest compressions are often ineffective for patients arresting after cardiac surgery, for whom emergency resternotomy may be required. A single-blinded randomized controlled trial (RCT) was performed, with participants being randomized to a virtual reality (VR) Cardiac Surgical Unit Advanced Life Support (CSU-ALS) simulator training arm or a conventional classroom CSU-ALS training arm. Twenty-eight cardiothoracic surgery (CTS) residents were included and subsequently assessed in a moulage scenario in groups of two, either participating as a leader or surgeon. The primary binary outcomes were two time targets: (1) delivering three stacked shocks within 1 min and (2) resternotomy within 5 min. Secondary outcomes were the number of protocol mistakes made and a questionnaire after the VR simulator. The conventional training group administered stacked shocks within 1 min in 43% (n = 6) of cases, and none in the VR group reached this target, missing it by an average of 25 s. The resternotomy time target was reached in 100% of the cases (n = 14) in the conventional training group and in 83% of the cases (n = 10) in the VR group. The VR group made 11 mistakes in total versus 15 for those who underwent conventional training. Participants reported that the VR simulator was useful and easy to use. The results show that the VR simulator can provide adequate CSU-ALS training. Moreover, VR training results in fewer mistakes suggesting that repetitive practice in an immersive environment improves skills.

DETERMINING THE EFFECTIVENESS OF CARDIOPULMONARY RESUSCITATION USING A MANIKIN

Objectives: Many studies have shown that people applying cardiopulmonary resuscitation (CPR) cannot make sustained and effective CPR due to fatigue, sweaty hands, broken ribs, inability to determine the correct area etc. Thus, this study aimed to determine the effectiveness and sustainability of CPR quality using a CPR manikin by following the 2015 CPR guidelines.Material and Method: This study was carried out with 153 student volunteers from seven different health sciences programmes at Izmir University of Economics. All students were trained in first aid and basic life support in the previous school academic year. The time and effectiveness of CPR applied on a CPR manikin (Ambu® Manikin) were measured. The students’ body positioning, blowing capacities, depth of pressures and effective pressure durations were evaluated and numerical data were analysed by t-test. P-value &amp;lt;0.05 was accepted as statistically significant. Data were analysed using SPSS version 21.Results: Of the 153 student volunteers, 60.1% were female and 39.9% were male. The average student age was 20.32 ± 03 years, the average height was 169.20 ± 26 cm and the average weight was 65.12 ± 42 kg. The average effective CPR duration was 2.95 ± 0.86 min, the average pressure depth was 4.33 cm and the average depth of pressures and effective pressure was 0.6 liters. The position of the arms was correct in 83% of the students. In 81% of the cases, the application site was correctly determined. Moreover, 68.6% of the students were able to sustain the pumping activity of the heart. In all parameters other than the arms position, male students had better results than female students. CPR is a very important live-saving method to increase the chance of survival. However, this practice is ineffective unless applied correctly and timely.Conclusion: This study showed that manual chest compression on the manikin became ineffective in both speed and effectiveness just within minutes. This shows that there is a very important deficiency in this area where human life depends on minutes. Thus, developing and commissioning auxiliary external chest compression device that can perform CPR, especially in pre-hospital setting, ambulance and emergency departments, is important.

Effect of thoracic stiffness on chest compression performance - A prospective randomized crossover observational manikin study

IntroductionHuman thoracic stiffness varies and may affect the performance during external chest compression (ECC). The Extra Compression Spring Resusci® QCPR Anne manikin is a high-fidelity training model developed for ECC training that can account for varying levels of thoracic stiffness. The aim of this study was to use this training model to investigate the effects of thoracic stiffness on ECC biomechanics and qualities. MethodsFifty-two participants performed standard ECC on the manikin with different thoracic springs to simulate varying levels of thoracic stiffness. The MatScan Pressure Measurement system was used to investigate the ECC pressure and force distribution. ResultsThe hard spring group’s performance had a better complete recoil ratio (90.06 ± 24.84% vs. 79.75 ± 32.17% vs. 56.42 ± 40.15%, p < 0.001 at second minute), but was more inferior than the standard and soft spring groups in overall quality, ECC depth (34.17 ± 11.45 mm vs. 41.25 ± 11.42 mm vs. 51.88 ± 7.56, p < 0.001 at second minutes), corrected depth ratio, and corrected rate ratio. The hard spring group had less radial-ulnar peak pressure difference (kgf/cm2) than the other two groups (−0.28 ± 0.38 vs. −0.30 ± 0.43 vs. −0.47 ± 0.34, p = 0.01), demonstrating that more symmetrical pressure was applied in the hard spring group. The soft spring group had better ECC depth, corrected depth ratio, corrected rate ratio, and overall quality, but its performance in complete recoil was inferior, and unbalanced pressure was more liable to cause injury. Hard springs caused operator fatigue easily. ConclusionThe thoracic stiffness greatly affected the performance of ECC. Our findings provided information for more effective ECC practices and training.

Visual Transformers and Convolutional Neural Networks for Disease Classification on Radiographs: A Comparison of Performance, Sample Efficiency, and Hidden Stratification.

To compare performance, sample efficiency, and hidden stratification of visual transformer (ViT) and convolutional neural network (CNN) architectures for diagnosis of disease on chest radiographs and extremity radiographs using transfer learning. In this HIPAA-compliant retrospective study, the authors fine-tuned data-efficient image transformers (DeiT) ViT and CNN classification models pretrained on ImageNet using the National Institutes of Health Chest X-ray 14 dataset (112 120 images) and MURA dataset (14 656 images) for thoracic disease and extremity abnormalities, respectively. Performance was assessed on internal test sets and 75 000 external chest radiographs (three datasets). The primary comparison was DeiT-B ViT vs DenseNet121 CNN; secondary comparisons included DeiT-Ti (Tiny), ResNet152, and EfficientNetB7. Sample efficiency was evaluated by training models on varying dataset sizes. Hidden stratification was evaluated by comparing prevalence of chest tubes in pneumothorax false-positive and false-negative predictions and specific abnormalities for MURA false-negative predictions. DeiT-B weighted area under the receiver operating characteristic curve (wAUC) was slightly lower than that for DenseNet121 on chest radiograph (0.78 vs 0.79; P < .001) and extremity (0.887 vs 0.893; P < .001) internal test sets and chest radiograph external test sets (P < .001 for each). DeiT-B and DeiT-Ti both performed slightly worse than all CNNs for chest radiograph and extremity tasks. DeiT-B and DenseNet121 showed similar sample efficiency. DeiT-B had lower chest tube prevalence in false-positive predictions than DenseNet121 (43.1% [324 of 5088] vs 47.9% [2290 of 4782]). Although DeiT models had lower wAUCs than CNNs for chest radiograph and extremity domains, the differences may be negligible in clinical practice. DeiT-B had sample efficiency similar to that of DenseNet121 and may be less susceptible to certain types of hidden stratification.Keywords: Computer-aided Diagnosis, Informatics, Neural Networks, Thorax, Skeletal-Appendicular, Convolutional Neural Network (CNN), Feature Detection, Supervised Learning, Machine Learning, Deep Learning Supplemental material is available for this article. © RSNA, 2022.

Evaluation of resuscitative endovascular balloon occlusion of the aorta catheter placement and comparison to resuscitative thoracotomy with aortic clamping in cadaver dogs.

To describe placement of an aortic occlusion catheter in aortic zone 1 (Z1) and aortic zone 3 (Z3) in dogs and to compare time to placement in these zones with and without external chest compressions (ECC). Additional evaluations of time to placement in Z1 with time for resuscitative thoracotomy with aortic clamping (RT-AC) were performed. Prospective ex vivo study. University teaching hospital. Ten canine cadavers. Ten cadaver dogs were obtained from client donation after euthanasia. Cadavers were randomized to have balloon catheter placement into the right or left femoral artery via cutdown, with or without ECC. The xiphoid was used as an external anatomical landmark for Z1, and the spinous process of the 5th lumbar vertebra was used for Z3. Balloon placement was confirmed with radiography. Time to balloon placement in Z1 and Z3 and time to RT-AC were recorded. Median body weight was 23.5kg (9-40kg). Median time to Z1 placement was 6.6 minutes (4.6-12.4minutes) with ECC and 6.9 minutes (3.3-13.1minutes) without ECC and was not statistically different (P=0.5). Median time to RT-AC was 1 minute (0.6-1.4minutes), which was significantly faster than time to balloon placement in Z1 with or without ECC (P=0.004 and P=0.002, respectively). Endovascular balloon occlusion of the aorta can be achieved by cutdown with and without ECC, but RT-AC is faster. Successful balloon position in Z1 could be achieved with knowledge of external anatomical landmarks, but landmarks for Z3 need further study.

Функціональний стан кардіореспіраторної системи борців греко-римського стилю на етапі попередньої базової підготовки.

Greco-Roman wrestling places high demands on functional training, which determines the further success of tech-nical and tactical training of athletes. The aim is to determine the features of the functional state of the cardiorespiratory system of Greco-Roman wrestlers at the stage of preliminary basic training in the preparatory period. The study used theoretical research methods (theoretical analysis of scientific and methodological literature) and empirical: computer rheography (this device is intended to determine the functional state of the cardiovascular system), computer spirography (this device is intended to determine the functional state of the respiratory system), and mathematical methods statistics. The mean value of vital capacity in the group of wrestlers at the beginning of the study was 2.40 ± 0.04 l, which was 80.78 ± 1.85% of the appropriate values and showed reduced ability to external respiration and chest rigidity. The detailed distribution of Greco-Roman wrestling according to the forced vital lung capacity in relation to the normative values showed that this indicator in the norm was in 26% of subjects, in the conditional norm – in 41%, in 36% of subjects – in a slight decrease. Reduced ones compared to normal stroke volume (45.70 ± 1.41 ml) indicated a decrease in myocardial contractility, and proper values of minute volume of blood circulation were achieved due to increased heart rate, which is not a rational adaptive response in the state peace of mind. Functional training is an im-portant component of the preliminary basic training; the program of its improvement in Greco-Roman wrestling in the preparatory period is an urgent scientific and practical task of modern sport, and the indicators of physical fitness are a prerequisite for developing a program of improvement.

Biomechanical analysis of force distribution in one-handed and two-handed child chest compression- a randomized crossover observational study

BackgroundEven force distribution would generate efficient external chest compression (ECC). Little research has been done to compare force distribution between one-hand (OH) and two-handed (TH) during child ECC. Therefore, this study was to investigate force distribution, rescuer perceived fatigue and discomfort/pain when applying OH and TH ECC in children.MethodsCrossover manikin study. Thirty-five emergency department registered nurses performed lone rescuer ECC using TH and OH techniques, each for 2 min at a rate of at least 100 compressions/min. A Resusci Junior Basic manikin equipped with a MatScan pressure measurement system was used to collect data. The perceived exertion scale (modified Borg scale) and numerical rating scale (NRS) was applied to evaluate the fatigue and physical pain of delivering chest compressions.ResultsThe maximum compression force (kg) delivered was 56.58 ± 13.67 for TH and 45.12 ± 7.90 for OH ECC (p < 0.001). The maximum-minimum force difference force delivered by TH and OH ECC was 52.24 ± 13.43 and 41.36 ± 7.57, respectively (p < 0.001). The mean caudal force delivered by TH and OH ECC was 29.45 ± 16.70 and 34.03 ± 12.01, respectively (p = 0.198). The mean cranial force delivered by TH and OH ECC was 27.13 ± 11.30 and 11.09 ± 9.72, respectively (p < 0.001). The caudal–cranial pressure difference delivered by TH and OH ECC was 19.14 ± 15.96 and 26.94 ± 14.48, respectively (p = 0.016). The perceived exertion and NRS for OH ECC was higher than that of the TH method (p < 0.001, p = 0.004, respectively).ConclusionsThe TH method produced greater compression force, had more efficient compression, and delivered a more even force distribution, and produced less fatigue and physical pain in the rescuer than the OH method.Trial registrationThe Cheng Kung University Institutional Review Board A-ER-103-387. http://nckuhirb.med.ncku.edu.tw/sitemap.php

Knowledge, attitude, and practice of paramedics in Qatar regarding the use of personal protective equipment against COVID-19

Background: Internationally, the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, causing corona virus disease (COVID-19), has increased the demand on healthcare services and resources1. The proper use of personal protective equipment (PPE) by paramedics has recently become apparent2. The risk of COVID-19 transmission has increased during prehospital life-saving procedures generating aerosols such as non-invasive ventilation, tracheal intubation, and external chest compressions, especially when working in a confined ambulance compartment3. Paramedics are encouraged to increase body-surface-isolation by donning additional PPE (high-filtration facemasks/face shields/surgical gowns/surgical hoods) during all patient encounters2. This study aimed to better understand paramedics’ knowledge, attitude, and practice of PPE utilization in the State of Qatar during the COVID-19 pandemic. Methods: This prospective and quantitative study focused on the collection of descriptive data utilizing a purpose-designed online survey. Around 1300 frontline paramedics employed by Hamad Medical Corporation Ambulance Service (HMCAS) were invited via email to participate in the study. Results: 282 paramedics completed the survey. 90.4% were male and 78.7% had a bachelor&apos;s degree. 97.1% completed the mandatory HMCAS online infection control training program, 82.9% completed an N95 mask fit test in the last 5 years, and 91.5% completed the hand hygiene training program. The study found paramedics to be knowledgeable about COVID-19 and its transmission (98.2%) (Table 1). Paramedics’ attitude was mainly positive towards the use of PPE to prevent the spread of the virus which was synchronous with their practice. Conclusion: An effective model to curb the spread of COVID-19 amongst healthcare workers must consider the knowledge, attitude, and practice of first responders. This sample demonstrated a strong knowledge of COVID-19 and its transmission. Their overall positive attitude and good infection control practices were a demonstrative effort to mitigate risks associated with the spread of the virus in the prehospital setting.