Preoperative Anemia Screening and Treatment Practices in Patients Having Total Joint Replacement Surgery: A Retrospective, Observational Audit

Figures & data

Figure 1 Simplified guidance for appropriateness of treatment.

Note: Data from the National Blood Authority Patient Blood Management guidelines.¹

Table 1 Demographics

Patient Characteristics	Total
N	607
Male % (n)	44% (267)
Female % (n)	56% (340)
Age - mean (IQR)	67 (13)
Length of time from screening to surgery (median)	2–6 days
Preoperative anemia % (n)	14.6% (85)
Length of stay in hospital, mean (SD)	4 days (SD:1.94)
Hemoglobin - preop (g/L) median (IQR)	138 (18)
Ferritin (microg) (median, IQR)*	120.5 (161.5)

Note: *Patients with ferritin levels (n = 49).

Table 2 Screening Tests Utilised

Screening Tests	Total % (n/Total)
FBC % (n)	96% (583)
Iron studies % (n)	8% (49/607)
Renal studies % (n)	94.7% (575/607)
CRP % (n)	2.4% (15)

Table 3 Timeframes of Screening

Time Between Screening and Surgery	Total % (n/Total)
Screening 0–1 day % (n/total)	20.1% (122/607)
Screening 2–6 days % (n/total)	53.4% (324/607)
Screening 1–6 weeks % (n/total)	18.6% (113/607)
Screening 6 weeks or greater % (n/total)	3.95% (24/607)
No screening % (n/total)	3.95% (24/607)

Figure 2 Kaplan–Meier survival curve: length of stay difference between patients who were anaemic and non-anaemic preoperatively.

Seeber P, Shander A. Basics of Blood Management. 2nd ed. Hoboken: John Wiley & Sons; 2012.

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