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Table 2 Table showing mean Hb values pre-surgery as well as at 1st, 2nd and 3rd day after surgery

From: The role of suction drainage in the management of peri-operative bleeding in Total and Unicompartmental knee arthroplasty: a retrospective comparative study

 

t0 (pre-surgery)

t1 (1st day)

t2 (2nd day)

t3 (3rd day)

TKA and UKA

Without drainage

61

61

61

61

Mean Hb (SD)

13.263 (1.413)

11.242 (1.3896)

10.543 (1.5570)

10.245 (1.4616)

Drainage Group

73

73

73

73

Mean Hb (SD)

13.667 (1.2612)

11.315 (1.3533)

10.473 (1.3792)

10.133 (1.4587)

P-value

0.266

0.715

0.203

0.467

TKA

Without drainage

45

45

45

45

Mean Hb (SD)

13.147 (1.5135)

10.837 (1.4237)

9.970 (1.5073)

9.685 (1.3501)

Drainage Group

45

45

45

45

Mean Hb (SD)

13.653 (1.4263)

10.970 (1.2374)

10.063 (1.1764)

9.621 (1.1813)

P-value

0.287

0.592

0.888

0.669

UKA

Without drainage

27

27

27

27

Mean Hb (SD)

13.495 (1.1905)

12.050 (0.8965)

11.690 (0.8879)

11.365 (0.9549)

Drainage Group

17

17

17

17

Mean Hb (SD)

13.700 (0.7237)

12.188 (1.2663)

11.512 (1.3355)

11.429 (1.3008)

P-value

0.604

0.212

0.336

0.394

  1. Standard deviation (SD) for each value is shown in the brackets. P-values are given between groups pretreatment and at each follow-up