#	Search	Results
1	(pre?hospital* or pre-hospital* or extra?hospital* or extra-hospital* or mobile or portable or transit* or transport* or transfer* or helicopter* or airborn* or aircraft* or airliner* or airplane* or aeroplane* or plane* or ambulance* or ambulatory or emergency medical technician* or emt? or field* or first respon* or disaster*).tw,kf.	3,549,128
2	(((extracorporeal* or venoarterial*) adj2 membrane* adj2 oxygen*) or ECMO).tw,kf.	21,858
3	((extracorporeal* adj2 resuscitat*) or ECPR).tw,kf.	1545
4	2 or 3	22,526
5	((pre?hospital* or pre-hospital* or extra?hospital* or extra-hospital* or mobile or portable or transit* or transport* or transfer* or helicopter* or airborn* or aircraft* or airliner* or airplane* or aeroplane* or plane* or ambulance* or ambulatory or emergency medical technician* or emt? or field* or first respon* or disaster*) adj5 (((extracorporeal* or venoarterial*) adj2 membrane* adj2 oxygen*) or ECMO or ((extracorporeal* adj2 resuscitat*) or ECPR))).tw,kf. [prehospital ecmo]	800
6	cannulat*.tw,kf.	29,095
7	((pre?hospital* or pre-hospital* or extra?hospital* or extra-hospital* or mobile or portable or transit* or transport* or transfer* or helicopter* or airborn* or aircraft* or airliner* or airplane* or aeroplane* or plane* or ambulance* or ambulatory or emergency medical technician* or emt? or field* or first respon* or disaster*) adj5 cannulat*).tw,kf.	217
8	4 and 7 [prehospital ecmo − ooh cannulation & ecmo]	62
9	5 or 8 [prehospital ecmo master line]	817
10	Out-of-Hospital Cardiac Arrest/	7726
11	OHCA.tw,kf.	4842
12	(out-of-hospital* or ((out or outside) adj2 hospital*) or out-hospital* or pre?hospital* or pre-hospital* or extra?hospital* or extra-hospital* or at-home or workplace* or drown* or helicopter* or airborn* or aircraft* or airliner* or airplane* or aeroplane* or plane*).tw,kf.	400,916
13	(arrest* or CA or heart attack* or pulseless*).tw,kf.	496,538
14	((out-of-hospital* or ((out or outside) adj2 hospital*) or out-hospital* or pre?hospital* or pre-hospital* or extra?hospital* or extra-hospital* or at-home or workplace* or drown* or helicopter* or airborn* or aircraft* or airliner* or airplane* or aeroplane* or plane*) adj6 (arrest* or CA or heart attack* or pulseless*)).tw,kf. [ohca, explicit, keywording]	11,418
15	(prehospital or pre-hospital).jw.	5365
16	13 and 15 [ohca, implicit − “prehospital” journals]	601
17	Heart Arrest/ or exp Death, Sudden, Cardiac/	51,093
18	Emergency Medical Technicians/ or Ambulances/ or Disaster Medicine/ or Emergency Medical Services/ or Rescue Work/	60,272
19	17 and 18 [ohca, implicit − heart arrest + emt, ambulance or disaster, MeSH]	2939
20	(ambulance* or emergency medical technician* or emt? or field* or first respon* or disaster* or helicopter* or aircraft*).tw,kf.	1,290,334
21	((ambulance* or emergency medical technician* or emt? or field* or first respon* or disaster* or helicopter* or aircraft*) adj6 (arrest* or CA or heart attack* or pulseless*)).tw,kf. [ohca, implicit − heart arrest + emt, ambuldance or disaster, keywording]	2032
22	exp Heart Failure/ or exp Heart Rupture/	158,522
23	exp Myocardial Infarction/	198,376
24	22 or 23	342,818
25	12 or 15 or 20 [ooh indicators, implicit and explicit]	1,640,103
26	24 and 25 [ohca, implicit − heart failure/rupture or MI, MeSH, + ooh indicators, implicit or explicit, kw]	9012
27	(myocardial infarct* or minoca or cardiogenic shock).tw,kf.	247,453
28	((heart or cardio* or cardiac* or ventricul*) adj3 (fail* or ruptur*)).tw,kf.	264,275
29	27 or 28	473,977
30	((out-of-hospital* or ((out or outside) adj2 hospital*) or out-hospital* or pre?hospital* or pre-hospital* or extra?hospital* or extra-hospital* or at-home or workplace* or drown* or helicopter* or airborn* or aircraft* or airliner* or airplane* or aeroplane* or plane*) adj6 (myocardial infarct* or minoca or cardiogenic shock or ((heart or cardio* or cardiac* or ventricul*) adj3 (fail* or ruptur*)))).tw,kf. [ohca, implicit − heart failure/rupture or MI, kw, + ooh indicators, implicit or explicit, kw]	1415
31	10 or 11 or 14 or 16 or 19 or 21 or 26 or 30 [ohca master line]	25,317
32	9 and 31 [prehospital ecmo for ohca]	116
33	((newborn* or new-born* or neonat* or neo-nat* or infan* or child* or adolesc* or p?ediatr* or baby* or babies* or toddler* or kid or kids or boy* or girl* or juvenile* or teen* or youth* or pubescen* or preadolesc* or prepubesc* or preteen or tween) not adult*).ti,kf,jw.	2,250,433
34	32 not 33 [results, adult only]	109