Demographic characteristics and outcomes of continuous ambulatory peritoneal dialysis related peritonitis in Miri General Hospital, Malaysia

@#Introduction: Sarawak has a population that is geographically and characteristically widely varied. In this study we aimed to determine the demographic characteristics of our patient population who undergo continuous ambulatory peritoneal dialysis (CAPD) and to study the incidence, the microbiology and the outcome of CAPD peritonitis. Methods: A retrospective record review of all CAPD patients on follow-up at the Miri Hospital, Sarawak, Malaysia from 2014 until 2017 was done. Results and Discussion: During the 4-year period, the overall peritonitis rate was 0.184 episodes per patient-year. Gram-positive and gram-negative bacteria each constituted one-third of the peritonitis; fungi (2.6%), Mycobacterium tuberculosis (MTB) (5.3%), polymicrobial (2.6%) and sterile culture (26.3%). The most commonly isolated gram-positive bacteria were coagulase-negative Staphylococcus. Our peritonitis rate is comparable to that of other centres i.e., Japan 0.195 and Indonesia 0.25. In comparison, countries like India (0.41), Korea (0.40) and Singapore (0.59) had relatively higher rate of PD-associated peritonitis. Two tuberculosis peritonitis patients died. The rate of catheter removal was approximately 20%. Gram-negative bacteria and MTB have a higher risk of catheter loss. About one-fifth used rainwater to clean their CAPD exit site. Out of this group, 33% did not boil the rainwater prior to usage. Conclusion: Patient’s characteristics and microbial susceptibility vary in different places of practice. The high rates of culture-negative peritonitis and high mortality risks associated with TB peritonitis warrant special attention. In patients with refractory peritonitis, early catheter removal is warranted in order to reduce mortality and minimize damage to peritoneal membrane.

Study of low salt diet in hypertensive patients with chronic kidney disease

@#Introduction: The efficacy of blood pressure (BP) reduction with salt restriction in CKD subjects and its sustainability is not well established. Methods: We enrolled 75 hypertensive patients with CKD into one-month salt restricting diet. 24-hour urinary sodium and potassium was measured to verify their salt intake followed by 1½ year follow-up. Results: Their creatinine clearance was 43 ± standard deviation 33ml/min/1.73m2. Urinary Na excretion (24HUNa) was 173±129mmol/day, reducing to 148±81 by 31±6 day. Mean, systolic and diastolic BP (MBP, SBP, DBP) were reduced from 102±9 to 97±11 (p<0.001), 148±10 to 139±16 (p<0.001), 78±12 to 75±12 mmHg (p=0.012) respectively. Moderate correlations were shown between reductions in 24-hour urinary Na and MBP, SBP, DBP: r=0.366, 0.260, 0.365; p=0.001, 0.025, 0.001; whereas 24-hour urinary Na-K ratio showed mild correlation. Subjects have some tendency to drift back to previous Na intake profile in follow-up and thus repetitive education is necessary. In subanalysis, 34 subjects with baseline 24HUNa >150 mmol/day, benefited significantly with MBP, SBP, DBP reduction from 102±9 to 95±9 (p=0.001), 146±10 to 135±14 mmHg (p=0.001), 80±11 to 75±11 mmHg (p=0.002) in line with 24HUNa reduction from 253±154 to 163±87mmol/day (p=0.004) and urinary protein-creation ratio reduction from geometric mean of 95 to 65 g/mol. Thirty five subjects with 24HUNa reduction of >20mmol/day have significant reduction in MBP, SBP, DBP: -8 vs -2, -15 vs -4, -5 vs -2 mmHg (p=0.027, 0.006, 0.218) and urinary protein-creatinine ratio: -82 vs 2g/mol (p=0.030) compared to the other forty subjects. Conclusion: Quantification of 24-hour urinary Na helps in predicting potential antihypertensive effect with dietary salt reduction of CKD subjects. Salt restriction reduces BP especially in patients with estimated daily sodium intake of >150mmol/day. Reduction in sodium intake beyond 20mmol/day reduced both BP and proteinuria.

Outcome of Coronary Artery Bypass Grafting in End StageRenal Disease Patients

Introduction: End stage renal disease (ESRD) patients have a much higher rate of cardiac disease and cardiac mortality as compared with the general population. Revascularisation such as coronary artery bypass grafting (CABG) may also carry a higher rate of complications and morbidity. We compared our ESRD patients who underwent CABG with the general population and ESRD population. Methods: This is an observational study of ESRD patients who underwent CABG in our centre from 2003-2009 with case-control matching comparison with non-ESRD patients for ICU and hospital stay; and ESRD patients without CABG for survival. Patients with concomitant valvular operation were excluded. The primary outcomes were peri-operative complications and survival. Results: Eleven patients with mean age of 57.5±8.5 were included. All except 1 were diabetics. One patient had excessive haemorrhage requiring immediate re-thoracotomy, and t hi s was complicate d with thro mbosed AVF. Four patients e x perienced intr adialytic hyp otension postoperatively but all resolved within 1 week. Both ESRD and non-ESRD patients had equal number of ICU stay (3.1 versus 3.2 days, p=0.906) and hospital stay (7.6 versus 6.9 days, p=0.538). With average of 3.3 years follow-up (range from 1 to 7 years), 4 deaths were observed but only one from cardiac cause. Both ESRD cohorts with or without CABG have compatible left ventricular mass: 295 ± 86 vs 343 ± 113 g (p=0.226) and left ventricular mass: 174 ± 54 vs 206 ± 63 g/m2( p=0.157). The ou tco me of CAB G ESRD patien ts was comparable to matched ESRD patients without CABG with 90.9 % versus 91.9% 1 year survival, 95.5% versus 77.7% 2 year survival, 71.4% versus 70.3% 3 year and 40.0% versus 40.3% at 5 year survival (p=0.627, 0.386, 0.659 and 0.683 respectively). Conclusion: CABG in ESRD patients carries an acceptable perioperative complication rate. They have acceptable ICU and hospitalization duration in comparison to non-ESRD patients.Their long term survival was at least as good as matched ESRD patients without CABG.