Table 1

Results

A Demographic and pre-thoracotomy data
Patient number	1	2	3	4	5	6	7
Sex	M	M	M	M	M	M	M
Age	60	71	63	65	49	58	73
Witnessed	yes	yes	no	no	yes	yes	yes
Time to initiation of life support (basic or advanced)	0	0	?	7?	7	1	6
BLS duration (min)	13	4	4	0	0	9	0
First rhythm	vf	vf	asyst	asyst	vf	asyst	asyst
ALS time (min)	18	31	39	28	19	53	24
Pre-hospital time (min)	31	35	43	35	26	63	30
Rhythm on arrival	asyst	emd	emd	asyst	asyst	asyst	asyst
Time from arrival to thoracotomy (min)	13	5	5	5	3	3	5
Total time to thoracotomy	44	40	48?	40?	29	66	35
Asystole time (min)	30	n/a	1	33	21	56	29
?, Uncertainty because of unwitnessed arrest; n/a, not applicable; BLS, Basic Life Support; ALS, Advanced Life Support; VF, ventricular fibrillation; EMD, electromechanical dissociation; Asyst, asystole.
B Outcomes
Spontaneous breathing	no	yes	no	no	no	yes	no
ROSC achieved	yes	no	no	yes	no	no	yes
ROSC duration (min)	3	0	0	19+9+5	0	0	5
Time from thoracotomy to ROSC (min)	2			3			8
Survival	no patient survived to admission
Total arrest duration (min)	51	60	70	86	61	95	75
ROSC, return of spontaneous cardiac output.
C Post-thoracotomy data (during OCCC)
Patient number	1	2	3	4	5	6	7
Blood pressure—automated measurements (NIBP) (mm Hg)
Systolic—1st measurement	156	150	60	88	154	138	96
Diastolic—1st measurement	112	100	30	59	117	100	53
Systolic—2nd measurement	*	136	—	*	87	159	*
Diastolic—2nd measurement	*	100	—	*	53	?	*
*No further NIBP measurements presented because of ROSC.
Acidosis evolution
pH—1st sample	7.11	7.175	6.967	6.707	7.021	6.954	7.174
Bicarb (mEq)				50	50	50
Interval to 2nd sample (min)		15	8	23		7	8
pH—2nd sample	—	7.091	6.938	6.689*	—	6.879	7.322
BE—1st sample	−20.8	−18.9	−18.6	−27.0	−16.8	−12.7	−7.2
BE—2nd sample		−21.6	−21.5	−27.3*		−24.3	−9.9
Arterial blood gases analysis
Po₂—1st sample	36.84	31.61	7.86	14.60	13.47	2.54	68.96
Po₂—2nd sample		51.26	10.48	41.55*		49.33	69.51
Pco₂—1st sample	3.05	3.02	6.72	5.50	7.70	11.21	7.52
Pco₂—2nd sample		2.92	5.40	5.64*		4.54	3.98
*Patient 4 had spontaneous output when second arterial blood sample was taken.