Right ventricular free wall longitudinal strain during weaning from mechanical ventilation using high-flow or conventional oxygen treatment: a pilot study

The Ultrasound Journal

Table 1 Baseline characteristics and outcomes of the included patients

Pt. no.	Age	Admission diagnosis	Days on MV	SOFA score*	Baseline RVFWSL, % (day 1; day 2)**	Baseline PEEP, cmH₂O (day 1; day 2)	SBT outcome (day 1; day 2)	Weaning outcome (day 1; day 2)***
1	64	Traumatic brain injury	24	5	25.9; 25.6	7; 5	S; S	S; S
2	73	Brain hemorrhage	26	3	20.4; 21.8	5; 5	S; S	F; F
3	71	Lobectomy	26	5	18.0; 20.0	6; 7	S; S	F; F
4	57	Brain hemorrhage	15	3	29.7; 34.1	7; 7	S; S	S; S
5	48	Multitrauma	18	5	18.8; NA	6; NA	S; NA	F; NA
6	47	Multitrauma	60	5	22.8; NA	6; NA	S; NA	F; NA
7	60	Pneumonia	21	4	17.9; NA	4; NA	S; NA	F; NA
8	61	Esophagectomy	32	4	25.9; 28.0	6; 6	S; S	F; F
9	64	Brain hemorrhage	26	6	21.1; NA	6; NA	S; NA	S; NA

MV: mechanical ventilation; SOFA: Sequential Organ Failure Assessment; RVFWSL: right ventricular free wall longitudinal strain; PEEP: positive end-expiratory pressure; SBT: spontaneous breathing trial; NA: not available/applicable; S: successful; F: failed
^* On the day of first SBT
^** RVFWS values are presented as absolute values, with higher numbers signifying better cardiac function
^*** Weaning success was defined as the ability of the patient to tolerate spontaneous ventilation through tracheostomy during the next 24 h