Accuracy of intracranial pressure monitoring: systematic review and meta-analysis

Table 3 Main features of the studies reporting drift

	Author and year of publication	Probe type	Readings (n)^a	Test duration (days)	ICP range (mmHg)
Clinical studies
1	Statham 1993 [22]	Fiberoptic	11	1–11	0/+4
2	Bavetta 1997 [27]	Fiberoptic	83	1–12	−12/+14
3	Münch1998 [28]	Fiberoptic	95	1–17	−15/+12
4	Martines-Mañas 2000 [29]	Fiberoptic	56	1–12	−24/+35
5	Poca 2002 [19]	Fiberoptic	126	1–11	−12/+7
6	Stendel 2003-1 [17]	Fiberoptic	50	1–32	0/+12
7	Gelabert-González 2006 [9]	Fiberoptic	624	1–5	−17/+21
8	Gopinath 1995 [23]	Microstrain gauge	25	2–7	−2/+2
9	Stendel 2003-2 [17]	Microstrain gauge	98	3–28	−2/+3
10	Koskinen 2005 [8]	Microstrain gauge	128	1–16	−5/+4
11	Citerio 2008 [30]	Microstrain gauge	89	1–10	−4/+8
12	Al-Tamimi 2009 [20]	Microstrain gauge	88	3; 6^b	NA
13	Lang 2003 [31]	Microstrain gauge	84	3–28	−2/+2
Laboratory studies
14	Czosnyka 1996-1 [32]	Fiberoptic	1	3	−0.8/+0.8
15	Czosnyka 1996-2 [32]	Fiberoptic	1	3	−0.4/+0.4
16	Piper 2001 [33]	Fiberoptic	34	1–12	−13/+22
17	Sundbӓrg 1987 [12]	Microstrain gauge	1	3	−2/+2
18	Czosnyka 1996-3 [32]	Microstrain gauge	1	3	−0.8/+0.8
19	Morgalla 1999 [10]	Microstrain gauge	7	10	−4/+3
20	Citerio 2004 [11]	Microstrain gauge	10	5	0/+2

Studies reporting drift were classified according to the setting (clinical or laboratory). Some papers reported more than one study; one paper is cited three times. Since different probes were analyzed in some studies, a single reference may appear more than once
^aIndicates how many readings of drift were used to calculate the range, mean and/or median (see text for more details)
^bThe study by Al-Tamimi et al. included data from two centers and reported the median observation time for both
ICP Intracranial pressure, NA Not available

ISSN: 1364-8535