Table 4.

Overview of the characteristics regarding costs, usability, accuracy, response time, hygiene, privacy, and user safety of the category “other” techniques (IR and US).

Type	Cost	Usability	Accuracy	Response Time	Hygiene	Privacy	User Safety
Infrared (IR)	-	-	4.4% non-detection rate for IR based RTLS [22]	-	-	-	-
			Detection rate: 96% [22]
			1 hospital: room-level accuracy [19]
Ultrasound (US)	-	-	2 hospitals: able to locate tag, but no room-level accuracy [19]	-	-	-	-