scholarly journals A New Chest Compression Depth Feedback Algorithm for High-Quality CPR Based on Smartphone

2015 ◽  
Vol 21 (1) ◽  
pp. 36-41 ◽  
Author(s):  
Yeongtak Song ◽  
Jaehoon Oh ◽  
Youngjoon Chee
Keyword(s):  
Chest Compression ◽  
High Quality ◽  
Compression Depth ◽  
Feedback Algorithm

scholarly journals Comparison of Chest Compression Quality Using Wing Boards versus Walking Next to a Moving Stretcher: A Randomized Crossover Simulation Study

2020 ◽  
Vol 9 (5) ◽  
pp. 1584
Author(s):  
Yukako Nakashima ◽  
Takeji Saitoh ◽  
Hideki Yasui ◽  
Masahide Ueno ◽  
Kensuke Hotta ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Chest Compression ◽  
Vital Signs ◽  
Borg Scale ◽  
Chest Compressions ◽  
High Quality ◽  
Compression Depth ◽  
Hands On ◽  
Before And After ◽  
Randomized Crossover Study

Background: When a rescuer walks alongside a stretcher and compresses the patient’s chest, the rescuer produces low-quality chest compressions. We hypothesized that a stretcher equipped with wing boards allows for better chest compressions than the conventional method. Methods: In this prospective, randomized, crossover study, we enrolled 45 medical workers and students. They performed hands-on chest compressions to a mannequin on a moving stretcher, while either walking (the walk method) or riding on wings attached to the stretcher (the wing method). The depths of the chest compressions were recorded. The participants’ vital signs were measured before and after the trials. Results: The average compression depth during the wing method (5.40 ± 0.50 cm) was greater than during the walk method (4.85 ± 0.80 cm; p < 0.01). The average compression rates during the two minutes were 215 ± 8 and 217 ± 5 compressions in the walk and wing methods, respectively (p = ns). Changes in blood pressure (14 ± 11 vs. 22 ± 14 mmHg), heart rate (32 ± 13 vs. 58 ± 20 bpm), and modified Borg scale (4 (interquartile range: 2–4) vs. 6 (5–7)) were significantly lower in the wing method cohort compared to the walking cohort (p < 0.01). The rescuer’s size and physique were positively correlated with the chest compression depth during the walk method; however, we found no significant correlation in the wing method. Conclusions: Chest compressions performed on the stretcher while moving using the wing method can produce high-quality chest compressions, especially for rescuers with a smaller size and physique.

scholarly journals LO67: The impact of CPR quality during entire resuscitation episode on survival from cardiac arrest

CJEM ◽  
2017 ◽  
Vol 19 (S1) ◽  
pp. S51
Author(s):  
I. Drennan ◽  
A.K. Taher ◽  
S. Cheskes ◽  
C. Zhan ◽  
A. Byers ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Chest Compression ◽  
Patient Survival ◽  
P Value ◽  
High Quality ◽  
Compression Depth ◽  
Entire Duration ◽  
Cpr Quality ◽  
The Impact

Introduction: High-quality cardiopulmonary resuscitation (CPR) is essential for patient survival. Typically, CPR quality is only measured during the first 10 minutes of resuscitation. There is limited research examining the quality of CPR over the entire duration of resuscitation.Objective: To examine the quality of CPR over the entire duration of resuscitation and correlate the quality of CPR to patient survival. Methods: This was a retrospective observational study using data from the Toronto RescuNET Epistry-Cardiac Arrest database. We included consecutive, adult (&gt;18) OHCA treated by EMS between January 1, 2014 and September 30, 2015. High-quality CPR was defined, in accordance with 2015 AHA Guidelines, as a chest compression rate of 100-120/min, depth of 5.0-6.0 cm and chest compression fraction (ccf) of &gt;0.80. We further categorized high-quality resuscitation as meeting benchmarks &gt;80% of the time, moderate-quality between 50-80% and low-quality meeting benchmarks &lt;50% of the resuscitation. We used multivariable logistic regression to determine association between variables of interest, including CPR quality metrics, and survival to hospital discharge. Results: A total of 5,208 OHCA met our inclusion criteria with a survival rate of 8%. The median (IQR) duration of resuscitation was 23.0 min (15.0,32.7). Overall CPR quality was considered high-quality for ccf in 81% of resuscitation episodes, 41% for rate, and 7% for depth. The percentage of resuscitations meeting the quality benchmarks differed between survivors and non-survivors for both depth (15% vs 6%) and ccf (61% vs 83%) (P value &lt;0.001). After controlling for Utstein variables maintaining a chest compression depth within recommendations for &gt;80% showed a trend towards improved survival (OR 1.68, 95% CI 0.96, 2.92). Other variables associated with survival were public location, initial CPR by EMS providers or bystanders, witnessed cardiac arrest (EMS or bystander), and initial shockable rhythm. Increasing age and longer duration of resuscitation were associated with decreased survival. Conclusion: Overall, EMS providers were not able to maintain rate or depth within guideline recommendations for the majority of the duration of resuscitation. Maintaining chest compression depth for greater than 80% of the resuscitation showed a trend towards increased survival from OHCA.

scholarly journals Development of Smart-Ring-Based Chest Compression Depth Feedback Device for High Quality Chest Compressions: A Proof-of-Concept Study

Biosensors ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 35
Author(s):  
Seungjae Lee ◽  
Yeongtak Song ◽  
Jongshill Lee ◽  
Jaehoon Oh ◽  
Tae Ho Lim ◽  
...  
Keyword(s):  
Chest Compression ◽  
Depth Estimation ◽  
Estimation Algorithm ◽  
Feedback System ◽  
Measurement Unit ◽  
Smart Device ◽  
Feedback Systems ◽  
Chest Compressions ◽  
High Quality ◽  
Compression Depth

Recently, a smart-device-based chest compression depth (CCD) feedback system that helps ensure that chest compressions have adequate depth during cardiopulmonary resuscitation (CPR) was developed. However, no CCD feedback device has been developed for infants, and many feedback systems are inconvenient to use. In this paper, we report the development of a smart-ring-based CCD feedback device for CPR based on an inertial measurement unit, and propose a high-quality chest compression depth estimation algorithm that considers the orientation of the device. The performance of the proposed feedback system was evaluated by comparing it with a linear variable differential transformer in three CPR situations. The experimental results showed compression depth errors of 2.0 ± 1.1, 2.2 ± 0.9, and 1.4 ± 1.1 mm in the three situations. In addition, we conducted a pilot test with an adult/infant mannequin. The results of the experiments show that the proposed smart-ring-based CCD feedback system is applicable to various chest compression methods based on real CPR situations.

scholarly journals Effect of the Use of Metronome Feedback on the Quality of Pediatric Cardiopulmonary Resuscitation

2021 ◽  
Vol 18 (15) ◽  
pp. 8087
Author(s):  
Dongjun Yang ◽  
Wongyu Lee ◽  
Jehyeok Oh
Keyword(s):  
Cardiopulmonary Resuscitation ◽  
Chest Compression ◽  
Healthcare Providers ◽  
Compression Rate ◽  
Audio Feedback ◽  
Simple Method ◽  
Compression Depth ◽  
Pediatric Resuscitation ◽  
Cpr Quality

Although the use of audio feedback with devices such as metronomes during cardiopulmonary resuscitation (CPR) is a simple method for improving CPR quality, its effect on the quality of pediatric CPR has not been adequately evaluated. In this study, 64 healthcare providers performed CPR (with one- and two-handed chest compression (OHCC and THCC, respectively)) on a pediatric resuscitation manikin (Resusci Junior QCPR), with and without audio feedback using a metronome (110 beats/min). CPR was performed on the floor, with a compression-to-ventilation ratio of 30:2. For both OHCC and THCC, the rate of achievement of an adequate compression rate during CPR was significantly higher when performed with metronome feedback than that without metronome feedback (CPR with vs. without feedback: 100.0% (99.0, 100.0) vs. 94.0% (69.0, 99.0), p < 0.001, for OHCC, and 100.0% (98.5, 100.0) vs. 91.0% (34.5, 98.5), p < 0.001, for THCC). However, the rate of achievement of adequate compression depth during the CPR performed was significantly higher without metronome feedback than that with metronome feedback (CPR with vs. without feedback: 95.0% (23.5, 99.5) vs. 98.5% (77.5, 100.0), p = 0.004, for OHCC, and 99.0% (95.5, 100.0) vs. 100.0% (99.0, 100.0), p = 0.003, for THCC). Although metronome feedback during pediatric CPR could increase the rate of achievement of adequate compression rates, it could cause decreased compression depth.

scholarly journals Recognition of Abnormal Chest Compression Depth Using One-Dimensional Convolutional Neural Networks

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 846
Author(s):  
Liang Zhao ◽  
Yu Bao ◽  
Yu Zhang ◽  
Ruidong Ye ◽  
Aijuan Zhang
Keyword(s):  
Chest Compression ◽  
Sensor Data ◽  
Evaluation Procedure ◽  
Support Vector ◽  
Portable Devices ◽  
Sensor Signal ◽  
Distance Measurements ◽  
Compression Depth ◽  
One Dimensional ◽  
Starting Point

When the displacement of an object is evaluated using sensor data, its movement back to the starting point can be used to correct the measurement error of the sensor. In medicine, the movements of chest compressions also involve a reciprocating movement back to the starting point. The traditional method of evaluating the effects of chest compression depth (CCD) is to use an acceleration sensor or gyroscope to obtain chest compression movement data; from these data, the displacement value can be calculated and the CCD effect evaluated. However, this evaluation procedure suffers from sensor errors and environmental interference, limiting its applicability. Our objective is to reduce the auxiliary computing devices employed for CCD effectiveness evaluation and improve the accuracy of the evaluation results. To this end, we propose a one-dimensional convolutional neural network (1D-CNN) classification method. First, we use the chest compression evaluation criterion to classify the pre-collected sensor signal data, from which the proposed 1D-CNN model learns classification features. After training, the model is used to classify and evaluate sensor signal data instead of distance measurements; this effectively avoids the influence of pressure occlusion and electromagnetic waves. We collect and label 937 valid CCD results from an emergency care simulator. In addition, the proposed 1D-CNN structure is experimentally evaluated and compared against other CNN models and support vector machines. The results show that after sufficient training, the proposed 1D-CNN model can recognize the CCD results with an accuracy rate of more than 95%. The execution time suggests that the model balances accuracy and hardware requirements and can be embedded in portable devices.

The suprasternal notch as a landmark of chest compression depth in CPR

2016 ◽  
Vol 34 (3) ◽  
pp. 433-436 ◽  
Author(s):  
Tae Hu Kim ◽  
Soo Hoon Lee ◽  
Dong Hoon Kim ◽  
Ryun Kyung Lee ◽  
So Yeon Kim ◽  
...  
Keyword(s):  
Chest Compression ◽  
Suprasternal Notch ◽  
Compression Depth

Does the Q-CPR chest compression pad reliably determine compression depth during cardiopulmonary resuscitation?

2012 ◽  
Vol 29 ◽  
pp. 190 ◽  
Author(s):  
P. Schober ◽  
R. Krage ◽  
V. Lagerburg ◽  
D. van Groeningen ◽  
S. A. Loer ◽  
...  
Keyword(s):  
Cardiopulmonary Resuscitation ◽  
Chest Compression ◽  
Compression Depth

Accurate feedback of chest compression depth and rate on a manikin in a moving train

Resuscitation ◽  
2015 ◽  
Vol 96 ◽  
pp. 13
Author(s):  
Digna María González-Otero ◽  
Sofía Ruiz de Gauna ◽  
Jesús Ruiz ◽  
Beatriz Chicote ◽  
Raquel Rivero ◽  
...  
Keyword(s):  
Chest Compression ◽  
Compression Depth ◽  
Moving Train

Abstract 13721: The Monitoring of rSO2 Value During CPR is Useful for High-Quality CPR

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Yoshihito Ogawa ◽  
Tadahiko Shiozaki ◽  
Tomoya Hirose ◽  
Mitsuo Ohnishi ◽  
Goro Tajima ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Chest Compression ◽  
Clinical Utility ◽  
Spontaneous Circulation ◽  
Regional Cerebral Oxygen Saturation ◽  
High Quality ◽  
Specificity And Sensitivity ◽  
Single Center Study ◽  
Manual Chest Compression ◽  
Hospital Cardiac Arrest

[Background] Recently, the patients with out-of-hospital cardiac arrest are increasing. It is very important to do chest compression continuously for the return of spontaneous circulation (ROSC). But we can not but stop chest compression during checking pulse every few minutes. We reported that Regional cerebral Oxygen Saturation (rSO2) value was not elevated by manual chest compression and mechanical chest compression increased a little rSO2 value on CPR without ROSC and rSO2 value became a good parameter of ROSC in single center study. [Purpose] The purpose of this study is to evaluate clinical utility of rSO2 value during CPR in multicenter study. [Method] Retrospectively, we considered the rSO2 value of the out-of -hospital cardiac arrest patients from December 2012 to December 2014 in multicenter. During CPR, rSO2 were recorded continuously from the forehead of the patients by TOS-OR (Japan). CPR for patients with OHCA was performed according to the JRC-guidelines 2010. [Result] 252 patients with OHCA were included in this study. The rSO2 value on arrival, during CPR and ROSC were 44.4±8.9%, 45.4±9.7%, 58.6±9.2%. In ROSC, with rSO2 cutoff value of 52.7%, the specificity and sensitivity were 80% and 79%, respectively. The negative predict value was 99.2%, respectively. It means little possible to ROSC, if the rSO2 value is less than 52.7%. So, it may be possible to reduce the frequency of checking pulse during CPR. [Conclusion] The monitoring of rSO2 value could reduce the frequency of checking pulse during CPR and do chest compression continuously.

scholarly journals Leg-heel chest compression as an alternative for medical professionals in times of COVID-19

2021 ◽  
Author(s):  
Matthias Ott ◽  
Alexander Krohn ◽  
Laurence H. Bilfield ◽  
F. Dengler ◽  
C. Jaki ◽  
...  
Keyword(s):  
Chest Compression ◽  
Effective Alternative ◽  
Medical Professionals ◽  
Compression Rate ◽  
Compression Depth ◽  
Significant Difference ◽  
Manual Chest Compression ◽  
Special Circumstances ◽  
Previous Training

AbstractObjectiveTo evaluate leg-heel chest compression without previous training as an alternative for medical professionals and its effects on distance to potential aerosol spread during chest compression.Methods20 medical professionals performed standard manual chest compression followed by leg-heel chest compression after a brief instruction on a manikin. We compared percentage of correct chest compression position, percentage of full chest recoil, percentage of correct compression depth, average compression depth, percentage of correct compression rate and average compression rate between both methods. In a second approach, potential aerosol spread during chest compression was visualized.ResultsThere was no significant difference between manual and leg-heel compression. The distance to potential aerosol spread could have been increased by leg-heel method.ConclusionUnder special circumstances like COVID-19-pandemic, leg-heel chest compression may be an effective alternative without previous training compared to manual chest compression while markedly increasing the distance to the patient.

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