Injection of Bupivacaine into the Pleural and Mediastinal Drains: A Novel Approach for Decreasing Incident Pain After Cardiac Surgery – Montreal Heart Institute Experience

Figures & data

Table 1 Odds of Infection in the Exposed and Non-Exposed Groups (May 2016 to September 2018)

Patients	Infection +	Infection -	Total
Injection drains +	11	1337	1348
Injection drains -	26	3018	3044
Total	37	4355	4392

Table 2 Odds of Infection in the Exposed and Non-Exposed Groups (December 2018 to September 2019)

Patients	Infection +	Infection -	Total
Injection drains +	1	170	171
Injection drains -	12	1250	1262
Total	13	1420	1433

Table 3 Absolute Pain Scores on Day 1

Pain Score	May 2016–Sept 2018	Dec 2018–Sept 2019
Mean score rest: 0–10	1.29	1.51
Mean score mvt: 0–10	2.0	2.8
Mean score rest: 1–10	3.43	3.18
Mean score mvt: 1–10	3.92	3.99
Total	4392	1433

Notes: Evaluation of pain scores for all patients (0–10). Evaluation of pain only for patients who reported pain (1–10).

Abbreviation: MVT, movement.

Table 4 Demographics at 2 Time Points

		May 2016–Sept 2018	Dec 2018–Sept 2019
Mean Age		66 Years	67 Years
Sex	M	3237 (72%)	1017 (71%)
	F	1268 (28%)	416 (29%)
Surgery	CABG	2032 (45%)	644 (45%)
	Minimally invasive	411 (9%)	108 (8%)
	AVR	1085 (24%)	303 (21%)
	Other	977 (22%)	378 (26%)
Total		4505	1433

Abbreviations: CABG, coronary artery bypass graph; AVR, aortic valve replacement.