Schiller Medical SAS

Wissembourg, France

Schiller Medical SAS

Wissembourg, France

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Krasteva V.,Bulgarian Academy of Science | Jekova I.,Bulgarian Academy of Science | Dotsinsky I.,Bulgarian Academy of Science | Didon J.-P.,Schiller Medical SAS
Annals of Biomedical Engineering | Year: 2010

Minimum "hands-off" intervals during cardiopulmonary resuscitation (CPR) are required to improve the success rate of defibrillation. In support of such life-saving practice, a shock advisory system (SAS) for automatic analysis of the electrocardiogram (ECG) contaminated by chest compression (CC) artefacts is presented. Ease of use for the automated external defibrillators (AEDs) is aimed and therefore only processing of ECG from usual defibrillation pads is required. The proposed SAS relies on assessment of outstanding components of ECG rhythms and CC artefacts in the time and frequency domain. For this purpose, three criteria are introduced to derive quantitative measures of band-pass filtered CC-contaminated ECGs, combined with three more criteria for frequency-band evaluation of reconstructed ECGs (rECG). The rECGs are derived by specific techniques for CC waves similarity assessment and are reproducing to some extent the underlying ECG rhythms. The rhythm classifier embedded in SAS takes a probabilistic decision designed by statistics on the training dataset. Both training and testing are fully performed on real CC-contaminated strips of 10 s extracted from human ECGs of out-of-hospital cardiac arrest interventions. The testing is done on 172 shockable strips (ventricular fibrillations VF), 371 non-shockable strips (NR) and 330 asystoles (ASYS). The achieved sensitivity of 90.1% meets the AHA performance goal for noise-free VF (>90%). The specificity of 88.5% for NR and 83.3% for ASYS are comparable or even better than accuracy reported in literature. It is important to note that, the aim of this SAS is not to recommend shock delivery but to advice the rescuers to "Continue CPR" or to "Stop CPR and Prepare for Shock" thus minimizing "hands-off" intervals. © 2010 Biomedical Engineering Society.


Krasteva V.,Bulgarian Academy of Science | Jekova I.,Bulgarian Academy of Science | Didon J.-P.,Schiller Medical SAS
Physiological Measurement | Year: 2011

This study aims to contribute to the scarce data available about the abilities of untrained lay persons to perform hands-only cardio-pulmonary resuscitation (CPR) on a manikin and the improvement of their skills during training with an autonomous CPR feedback device. The study focuses on the following questions: (i) Is there a need for such a CPR training device? (ii) How adequate are the embedded visual feedback and audio guidance for training of lay persons who learn and correct themselves in real time without instructor guidance? (iii) What is the achieved effect of only 3 min of training? This is a prospective study in which 63 lay persons (volunteers) received a debriefing to basic life support and then performed two consecutive 3 min trials of hands-only CPR on a manikin. The pre-training skills of the lay persons were tested in trial 1. The training process with audio guidance and visual feedback from a cardio compression control device (CC-Device) was recorded in trial 2. After initial debriefing for correct chest compressions (CC) with rate 85-115 min -1, depth 3.8-5.4 cm and complete recoil, in trial 1 the lay persons were able to perform CC without feedback at mean rate 95.9 18.9 min -1, mean depth 4.13 1.5 cm, with low proportions of 'correct depth', 'correct rate' and 'correct recoil' at 33%, 43%, 87%, resulting in the scarce proportion of 14% for compressions, which simultaneously fulfill the three quality criteria ('correct all'). In trial 2, the training process by the CC-Device was established by the significant improvement of the CC skills until the 60th second of training, when 'correct depth', 'correct rate' and 'correct recoil' attained the plateau of the highest quality at 82%, 90%, 96%, respectively, resulting in 73% 'correct all' compressions within 3 min of training. The training was associated with reduced variance of the mean rate 102.4 4.7 min -1 and mean depth 4.3 0.4 cm, indicating a steady CC performance achieved among all trained participants. Multivariable linear regression showed that the compression depth, rate and complete chest recoil did not strongly depend on lay person age, gender, height, weight in pre-training and training stage (correlation coefficient below 0.54). The study confirmed the need for developing CPR abilities in untrained lay persons via training by real-time feedback from the instructor or CC-Device. The CC-Device embedded feedback was shown to be comprehensible and easy to be followed and interpreted. The high quality of the CC-Device-assisted training process of lay persons was confirmed. Thus learning or refresher courses in basic life support could be organized for more people trained at the same time with fewer instructors needed only for the initial debriefing and presentation of the CC-Device. © 2011 Institute of Physics and Engineering in Medicine.


Didon J.-P.,Schiller Medical SAS | Krasteva V.,Bulgarian Academy of Science | Menetre S.,Schiller Medical SAS | Stoyanov T.,Bulgarian Academy of Science | Jekova I.,Bulgarian Academy of Science
Resuscitation | Year: 2011

Aims: Shortening hands-off intervals can improve benefits from defibrillation. This study presents the performance of a shock advisory system (SAS), which aims to decrease the pre-shock pauses by triggering fast rhythm analysis at minimal delay after end of chest compressions (CC). Methods: The SAS is evaluated on a database of 1301 samples from 311 out-of-hospital cardiac arrests (OHCA) from automated external defibrillators (AEDs). The following rhythms are identified: 788 asystoles (ASYS), 20 normal sinus rhythms (NSR), 394 other non-shockable rythms (ONS), 81 ventricular fibrillations (VF), 18 rapid ventricular tachycardias (VThi). SAS is launched in two-stages: first stage for accurate detection of actual end of CC (ReEoCC); second stage for early " Shock" /" No-Shock" decision by using all available artifact-free ECG signals after REoCC during 3, 5, 7 s. Results: Performance of the presented SAS versus AEDs is compared. The median hands-off time gained from earlier starting of ECG analysis is 5.8 s and for earlier shock advice is 12.5 s to 8.5 s when SAS rhythm analysis lasts 3 s to 7 s. The SAS accuracy at 3-7 s is: specificity 97.7-98.9% (ASYS), 100-100% (NSR), 98.5-99.2% (ONS); sensitivity 91.4-98.8% (VF), 88.9-96.7% (VThi). Conclusion: This study indicates that shortening the pre-shock hands-off pause by more efficient management of the SAS process in AEDs is possible. For analysis duration of 5 s (7 s), the delay between the end of chest compressions and the shock advice can be reduced by 10.5 s (8.5 s) median, while AHA requirements for rhythm detection accuracy are met. The use of this solution in AEDs could provide more reliable rhythm analysis than methods applying filtering techniques during CC. © 2011 Elsevier B.V.


Patent
Center Hospitalier Regional Of Nancy and Schiller Medical S.A.S. | Date: 2016-05-11

An MRI device (1) for use with a patient (12) having an implanted heart pacemaker (2) comprising an ECG monitor (3). The monitor is configured to detect spikes generated by the implanted pacemaker (2) before and/or during MRI examination,


Patent
Schiller Medical S.A.S. | Date: 2012-05-02

An external defibrillator for delivering a defibrillation shock to the heart of a patient under cardiac arrest is provided. The defibrillator comprises an energy source for providing electrical energy, at least one capacitor for building up and storing an electrical charge for delivery to the patient and at least one set of electrodes to be applied externally to the patients skin. The external defibrillator is adapted to provide at least one pulse train comprising at least one individual pulse of a duration of from 0.4 to 3 ms. Waveforms and methods of operating an automated external defibrillator are further provided.


Patent
Schiller Medical S.A.S. | Date: 2013-06-05

A device is provided for cooling intra nasally the brain of a patient, in particular of a patient suffering from cardiovascular emergency. The device comprises a pressurized gas container for containing a gas or a mixture of gases, and at least one cannula with a lumen, a proximal opening and at least one distal opening. The cannula is for introduction into the patients nasopharynx. Upon operation, gas expands adiabatically upon exiting from the at least one cannula, thereby cools and provides a coolant effect on the nasopharynx and inside the nasal cavity.


Patent
Schiller Medical S.A.S. | Date: 2010-03-12

A method, apparatus and computer program for defibrillation delivery decision comprising the steps of: a)Determining a shockable rhythm with a first algorithm, whereby said first algorithm is adapted to analyze an ECG signal in the presence of chest compression; b) Determining a shockable rhythm with a second algorithm, whereby said second algorithm is adapted to analyze an ECG in the absence of chest compression; c) Determining with a third algorithm if the patient is undergoing chest compression.


Patent
Schiller Medical S.A.S. | Date: 2010-04-07

A method, apparatus and computer program for defibrillation delivery decision comprising the steps of: a)Determining a shockable rhythm with a first algorithm, whereby said first algorithm is adapted to analyze an ECG signal in the presence of chest compression; b) Determining a shockable rhythm with a second algorithm, whereby said second algorithm is adapted to analyze an ECG in the absence of chest compression; c) Determining with a third algorithm if the patient is undergoing chest compression.


The invention relates to a defibrillator with integrated means for chest compression feedback. The defibrillator is shaped and sized such as to be directly placeable on the patients chest.


The invention relates to a defibrillator with integrated means for chest compression feedback. The defibrillator is shaped and sized such as to be directly placeable on the patients chest.

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