Blood-saving dissection with monopolar tungsten needle electrodes and Teflon-coated spatula electrodes in tumor orthopedics

Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 5 Overview of laboratory parameters of the two study groups

Laboratory parameters	Control group (n = 53)	Intervention group (n = 79)	p-value
INR preop., median (IQR)	1.04 (0.97–1.09)	1.02 (0.97–1.09)	0.5432^*
Hemoglobin difference (preop. − postop^a) (g/dl)	3.6 (1.9–4.7)	3.3 (2.4–4.7)	0.8143^*
Hematocrit difference (preop. − postop^a) (%)	10.7 (6.6–14.8)	10.4 (7.4–14.2)	0.7191^*
Creatinin difference (preop. − postop^a) (mg/dl)	0.1 (− 0.1 to 0.2)	0.0 (− 0.1 to 0.1)	0.2555^*

IQR interquartile range, INR International standardized ratio, pTT partial thromboplastin time
Bold font indicates p-value < 0.05
^*p-value from Mann–Whitney U-test
^aSubtraction of postoperative value minus preoperative value. Preoperative value: last value before surgery (not older than 7 days). Postoperative value: highest value (creatinin) or lowest value (hemoglobin, hematocrit) within 7 days after surgery