Association between Blood Potassium Level and Recovery of Postoperative Gastrointestinal Motility during Continuous Renal Replacement Therapy in Patient Undergoing Open Abdominal Surgery
Table 4
Baseline demographic and clinical characteristics of the potassium insufficient or sufficient group.
Characteristics
Patients (n=538)
potassium insufficient (n=305)
potassium sufficient (n=233)
Male sex ()
364 (67.66)
193 (63.28)
171 (73.39)
0.013
Mean age (y)
53.50±15.95
54.47±16.06
52.22±15.74
0.104
Operative characteristics
Gastrointestinal operation (%)
156 (29.00)
88 (28.85)
68 (29.18)
0.933
Nongastrointestinal operation (%)
382 (71.00)
217 (71.15)
165 (70.82)
0.933
Duration of operation (mean, min)
229.68±140.79
237.19±137.89
219.85±144.20
0.157
Intraoperative blood loss (mean, ml)
400 (100-1025)
500 (100-1000)
300 (100-1150)
0.365
Length of ICU stay (median, day)
7.00 (4.00-13.00)
8.00 (5.00-14.00)
6.00 (3.00-12.00)
0.114
Length of hospital stay (median, day)
27.00 (13.00-40.00)
30.00 (17.00-45.00)
23.00 (10.00-35.00)
0.026
APACHE II score (mean)
16.80±7.78
16.67±8.23
16.97±7.23
0.689
SOFA score (mean)
8.64±4.00
8.63±4.00
8.64±3.99
0.967
Initial time of CRRT after operation (median, day)
1.00 (0.00-3.00)
1.00 (0.00-3.00)
1.00 (0.00-2.00)
0.668
CRRT modality
<0.001
CVVH (%)
464 (86.25)
278 (91.15)
186 (79.83)
CVVHD/CVVHDF (%)
74 (13.75)
27 (8.85)
47 (20.17)
Prescribed dose of CRRT (mean in first 72 hours, ml/kg/h)
39.25±10.62
38.79±10.76
39.86±10.42
0.242
Delivered dose of CRRT (mean in first 72 hours, ml/kg/h)
29.65±13.30
29.49±14.31
29.87±11.87
0.743
Postoperative gastrointestinal motility recovery in 4.0 days ()
336 (62.45)
148 (48.52)
188 (80.69)
<0.001
Survival rates ()
289 (53.71)
159 (52.13)
130 (55.79)
0.399
c potassium insufficient group was defined as the patient’s mean postoperative plasma potassium level < 4.00 mmol/L before the primary endpoint defined in the present study, and postoperative plasma potassium level ≥ 4.00 mmol/L was considered as the sufficient group. CVVH stands for continuous veno-venous hemofiltration, CVVHD stands for continuous veno-venous hemodialysis, and CVVHDF stands for continuous veno-venous hemodiafiltration. p-value represents potassium insufficient cohort vs. potassium sufficient.
