Table 1.

Demographics, injuries, analgesic patterns, investigations and anticoagulants

	Patient 1	Patient 2	Patient 3
Age (years)	28	45	32
Gender	Male	Male	Male
Bone fractures	Left proximal humerus and left 1-7 MRFS, blunt injury	Right proximal humerus and right 2-8 MRFS	Left proximal humerus and left 3-7 MRFS,
Head Injury
Thoracic Injury	GCS13/15	GCS14/15	GCS15/15
Abdominal Injury	No visceral injury	No visceral injury	No visceral injury
	No visceral injury	No visceral injury	No visceral injury
RFS	9	7	7
SpO2 on admission without oxygen support	88%	92%	93%
Analgesics	PCM/D/FI	PCM/FI	PCM/FI
Post-analgesic NRS at 12 h	6	7	6
Bed side SAPB	Left SAPB at 4th rib with bolus 30ml 0.2% ropivacaine and infusion 0.1% ropivacaine 8ml/h	Right SAPB at 5th rib with bolus 30ml 0.2% ropivacaine	Left SAPB at 4th rib with bolus 30ml 0.2% ropivacaine and infusion 0.1% ropivacaine 8ml/h
		Infusion 0.1% ropivacaine 8ml/h
Bed side USG	Pleural effusion, pericardial effusion	Pleural effusion	Pleural effusion
Diaphragm function	Normal	Normal	Normal
HRCT contrast	Negative for PE;	Negative for PE;	Negative for PE;
	Pleural and pericardial effusion; Left lower lobe collapse and consolidation of apices	Pleural effusion; right lower lobe collapse	Pleural effusion; Left lower lobe collapse and consolidation of apices
Preoperative LMWH	Yes-stopped 12 h prior to block	Yes-stopped 12 h prior to block	Yes-stopped 12 h prior to block
CIIB volume	3+3ml	3+3+3ml	3+3ml
Oxygen saturation	*Lowest SpO2=90% at 30th minute	*Lowest SpO2=88% at 30th minute	*Lowest SpO2=97% at 30thminute
Anaesthesia	Adequate sensory analgesia	Adequate sensory analgesia	Adequate sensory analgesia

GCS - Glasgow coma scale; RFS - rib fracture score; MRFS - multiple rib fractures; NRS -numerical rating scale, PCM -paracetamol; D - diclofenac; FI - fentanyl infusion; Abd - abdominal; SAPB - serratus anterior plane block; USG - ultrasonography; HRCT - high-resolution computed tomography; PE - pulmonary embolism; LMWH - low molecular weight heparin; SpO₂ - peripheral oxygen saturation; CIIB - continuous incremental interscalene block; *on oxygen support