scholarly journals SURF: identifying and allocating resources during Out-of-Hospital Cardiac Arrest

2020 ◽  
Vol 20 (S11) ◽  
Author(s):  
Gaurav Rao ◽  
Salimur Choudhury ◽  
Pawan Lingras ◽  
David Savage ◽  
Vijay Mago
Keyword(s):  
Cardiac Arrest ◽  
Linear Programming ◽  
Integer Linear Programming ◽  
Processing Time ◽  
Emergency Services ◽  
Linear Programming Method ◽  
Bipartite Matching ◽  
Matching Algorithm ◽  
Hospital Cardiac Arrest ◽  
Cardiac Emergency

Abstract Background When an Out-of-Hospital Cardiac Arrest (OHCA) incident is reported to emergency services, the 911 agent dispatches Emergency Medical Services to the location and activates responder network system (RNS), if the option is available. The RNS notifies all the registered users in the vicinity of the cardiac arrest patient by sending alerts to their mobile devices, which contains the location of the emergency. The main objective of this research is to find the best match between the user who could support the OHCA patient. Methods For performing matching among the user and the AEDs, we used Bipartite Matching and Integer Linear Programming. However, these approaches take a longer processing time; therefore, a new method Preprocessed Integer Linear Programming is proposed that solves the problem faster than the other two techniques. Results The average processing time for the experimentation data was   1850 s using Bipartite matching,   32 s using the Integer Linear Programming and  2 s when using the Preprocessed Integer Linear Programming method. The proposed algorithm performs matching among users and AEDs faster than the existing matching algorithm and thus allowing it to be used in the real world. Conclusion: This research proposes an efficient algorithm that will allow matching of users with AED in real-time during cardiac emergency. Implementation of this system can help in reducing the time to resuscitate the patient.

scholarly journals When dispatcher assistance is not saving lives: assessment of process compliance, barriers and outcomes in out-of-hospital cardiac arrest in a metropolitan city in China

2020 ◽  
pp. emermed-2019-209291 ◽  
Author(s):  
Lin Zhang ◽  
Menyue Luo ◽  
Helge Myklebust ◽  
Chun Pan ◽  
Liang Wang ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Survival Rate ◽  
Cardiopulmonary Resuscitation ◽  
Emergency Services ◽  
Public Awareness ◽  
Survival Rates ◽  
Process Compliance ◽  
Barriers To Implementation ◽  
Prolonged Delay ◽  
Hospital Cardiac Arrest

BackgroundSeveral Chinese cities have implemented dispatcher-assisted cardiopulmonary resuscitation (DA-CPR), although out-of-hospital cardiac arrest (OHCA) survival rates remain low. We aimed to assess the process compliance, barriers and outcomes of OHCA in one of the earliest implemented (DA-CPR) programmes in China.MethodsWe retrospectively reviewed OHCA emergency dispatch records of Suzhou emergency medical service from 2014 to 2015 and included adult OHCA victims (>18 years) with a bystander-witnessed atraumatic OHCA that was subsequently confirmed by on-site emergency physician. The circumstances and DA-CPR process related to the OHCA event were analysed. Dispatch audio records were reviewed to identify potential barriers to implementation during the DA-CPR process.ResultsOf the 151 OHCA victims, none survived. The median time from patient collapse to call for emergency services and that from call to provision of cardiopulmonary resuscitation instructions was 30 (IQR 20–60) min and 115 (IQR 90–153) s, respectively. Only 110 (80.3%) bystanders/rescuers followed the dispatcher instructions; of these, 51 (46.3%) undertook persistent chest compressions. Major barriers to following the DA-CPR instructions were present in 104 (68.9%) cases, including caller disconnection of the call, distraught mood or refusal to carry out either compressions or ventilations.ConclusionsThe OHCA survival rate and the DA-CPR process were far from optimal. The zero survival rate is disproportionally low compared with survival statistics in high-income countries. The prolonged delay in calling the emergency services negated and rendered futile any DA-CPR efforts. Thus, efforts targeted at developing public awareness of OHCA, calling for help and competency in DA-CPR should be increased.

Abstract 14806: Predictors of Survival and Favourable Functional Outcomes Following an Out of Hospital Cardiac Arrest in Patients Systematically Brought to a Dedicated Heart Attack Centre

Circulation ◽  
2014 ◽  
Vol 130 (suppl_2) ◽  
Author(s):  
M Bilal Iqbal ◽  
Abtehale Al-Hussaini ◽  
Gareth Rosser ◽  
Saleem Salehi ◽  
Maria Phylactou ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Functional Status ◽  
Heart Attack ◽  
Functional Outcomes ◽  
Emergency Services ◽  
Survival Rates ◽  
Spontaneous Circulation ◽  
Term Survival ◽  
Poor Functional Status ◽  
Hospital Cardiac Arrest

BACKGROUND: Despite advances in cardiopulmonary resuscitation, survival remains low after out of hospital cardiac arrest (OOHCA), with less than 20% of patients surviving to hospital discharge. Acute coronary ischaemia is the predominating cause and prompt delivery of patients to dedicated facilities may improve outcomes. Since 2011, all patients in London with OOHCA, in whom a cardiac aetiology is suspected, are brought to dedicated Heart Attack Centres (HACs). OBJECTIVES: We sought to determine the predictors for survival and favourable functional outcomes following OOHCA in this setting. METHODS: We analysed 182 consecutive OOHCA patients brought by the emergency services to Harefield Hospital - a designated HAC in London. Of these, 174 patients achieved return of spontaneous circulation. We analysed (a) all-cause mortality at 1 year; and (b) functional status at discharge using a modified Rankins score (mRS:0-6, where mRS0-3=favourable functional status). We used multivariate models to determine predictors of survival and favourable functional status. RESULTS: The overall survival rates were 66.7% at 30 days and 62.1% at 1 year. Of the 174 patients, 95 patients (54.5%) had favourable functional status at discharge. Patients with favourable functional status had significantly reduced mortality rates compared to those with poor functional status: 30 days (1.2% vs. 72.2%, p<0.001) and 1 year (5.3% vs. 77.2%, p<0.001). Multivariate analyses identified a shorter duration of resuscitation and absence of cardiogenic shock as consistent independent predictors of both favourable functional status and long-term survival (figure). CONCLUSIONS: The strategic delivery of OOHCA patients to HACs is associated with improved functional status and survival. Those with favourable functional status at discharge have significantly improved survival. Our study supports the standardisation of care for such patients with the widespread adoption of dedicated facilities.

Sign in / Sign up

Export Citation Format

Share Document