Continuous low flow ascites drainage through the urinary bladder via the Alfapump system in palliative patients with malignant ascites

Table 4 Comparison of Pre and Post-implant Paracentesis and LVP – Events and Volumes per Patient

	N	Median	Q1	Q3	Mean	Std	Min	Max
Prior to Implant
Paracentesis^a
Event Rate (# Events/Months)	15	1.3	0.52	2.5	1.53	1.222	0	4.1
Volume Rate (Liters/Months)	10	6.78	2.96	12.05	7.89	6.026	1.8	21
Event Count	17	4	2	6	4.41	3.759	1	15
LVP^b
Event Rate (# Events/Months)	6	1.93	1.36	3	11.45	23.797	0.5	60
Volume Rate (Liters/Months)	6	12.35	8.64	21	67.43	36.08	5.3	345
Event Count	8	2	1	4	2.5	1.69	1	5
Post Implant
Paracentesis
Event Rate (# Events/Months)	10	0.08	0	0.57	0.31	0.458	0	1.2
^cVolume Rate (Liters/Months)	9	0.28	0	1.13	3.17	6.894	0	21
Event Count	10	1	0	1	0.6	0.516	0	1
LVP
Event Rate^d (# Events/Months)	1	1.07	1.07	1.07	1.07	.	1.1	1.1
^cVolume Rate (Liters/Months)	1	5.36	5.36	5.36	5.36	.	5.4	5.4
Event Count	1	1	1	1	1	.	1	1

^a includes LVP events and volumes. ^b Rates based upon observation period from first paracentesis to implant (not first LVP)
^cVolumes calculated only for patients with known paracentesis events – patients with null events are not included
^d Only one patient had an event – no data on frequency, timing, nor volume available
If Paracentesis’s data is missing but LVP’s is not missing, then LVP’s data is used for paracentesis

ISSN: 1472-684X