EFFICACY OF SUBCUTANEOUS LIDOCAINE INFUSION FOR CKD-ASSOCIATED PRURITUS (CKD-AP)

 

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https://storage.unitedwebnetwork.com/files/1099/eeae48641c66be6c0f43d5c58ff155e0.pdf
EFFICACY OF SUBCUTANEOUS LIDOCAINE INFUSION FOR CKD-ASSOCIATED PRURITUS (CKD-AP)

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Angela
Chou
Angela Chou angela.chou@sydney.edu.au Nepean Hospital Renal Department Sydney Australia * University of Sydney Faculty of Medicine Sydney Australia
Matthew Nguyen Matthew.Nguyen@health.nsw.gov.au Blacktown Hospital Renal Department Sydney Australia - Western Sydney University Faculty of Medicine Sydney Australia Sydney University Faculty of Medicine Sydney Australia
Kelly Li ChenleiKelly.Li@health.nsw.gov.au St George Hospital Renal Department Sydney Australia - University of New South Wales School of Clinical Medicine, Faculty of Medicine and Health Sydney Australia
 
 
 
 
 
 
 
 
 
 
 
 

Chronic Kidney Disease-associated pruritus (CKD-aP) is a debilitating and frequently under-recognised symptom that is associated with insomnia, depression, poor health-related quality of life and increased mortality. Treatment of refractory CKD-aP in patients with advanced chronic kidney disease (CKD) on a conservative kidney management (CKM) pathway can be challenging due to its incompletely understood pathophysiology. Treatment algorithms are not well defined when patients are unresponsive to traditional oral or topical therapies. Furthermore, CKM patients have difficulty accessing intravenous difelikefalin, which is only approved for haemodialysis patients. The evidence for use of subcutaneous lidocaine in CKD-aP is limited and to our knowledge there have been no data on conservatively managed CKD patients.

We herein report a case of a 59-year-old male with background of CKD secondary to diabetic nephropathy and Korsakoff Dementia on a non-dialytic CKM pathway who presented with severe CKD-aP exhibiting diffuse excoriation with areas of bleeding though no associated rash. His creatinine was 495umol/L, eGFR 10ml/min/1.73m2 and he scored 10/10 on the Visual Analogue Scale (VAS) for pruritus severity. Other skin conditions were excluded following dermatology review and multiple therapies had been trialled, including regular aqueous emollients, topical capsaicin, pregabalin (up to doses of 150mg BD), methylprednisone 0.1% ointment, sertraline, evening primrose oil and doxepin. Subcutaneous lidocaine infusion was trialled given the refractory nature of his pruritus at a starting dose of 400mg over 24-hours via syringe driver. The dose was gradually up-titrated to 600mg over 10-days and QTc was monitored with no evidence of toxicity. 

There was marked improvement in the appearance of his skin and healing of the diffuse excoriation over a period of 4 weeks. This was documented on sequential photographs demonstrating evidence of healing and resolution of the severe excoriation. His reported pruritus severity decreased to 6/10 on the VAS over 3-4 days and subsequently to 4/10 after another 7 days. No side-effects were observed. The response was sustained for 6 weeks, after which the patient deteriorated from underlying kidney failure and end of life care was provided.

Subcutaneous lidocaine infusion may be an effective and safe alternative treatment option for cases of refractory CKD-aP.

Kewords