1 / 53

HRS in children

Terlipressin /Medical Management in Hepatorenal Syndrome Akash Deep, Director - PICU King ’ s College Hospital London. 0. 0. HRS in children. No literature on HRS in children exists All evidence extracted from adult literature. Prevention - Potential targets. Portal Hypertension

walkersteven
Télécharger la présentation

HRS in children

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Terlipressin /Medical Management in Hepatorenal Syndrome Akash Deep, Director - PICU King’s College Hospital London 0 0

  2. HRS in children • No literature on HRS in children exists • All evidence extracted from adult literature.

  3. Prevention - Potential targets • Portal Hypertension • Bacterial translocation • Splanchnic vasodilators and mediators –TNF- alpha • Raised IAP • Iatrogenic factors

  4. Prevention • Norfloxacin: Ascitic protein < 15g/L, Bilirubin > 50 + Crea > 106 µmol/L or Na < 130 mmol/L, CPC >10 • Daily norfloxacin was associated with lower 1-year SBP probability (7% compared with 61%)and lower 1-year HRS probability.

  5. Prevention with Pentoxifylline –anti TNF-alpha E Akriviadas Gastroenterology 2000; 119 : 1637 Mortality • 12/49 (24.5%) PTX • 24/52 (46.1%) • p=0.036 HRS as cause of death • 6/12 (50%) PTX vs • 22/24 (91.7%) • p=0.009 nonsurvivors survivors Pentoxifylline Pentoxifylline Placebo Survival : Age, creatinine level on randomization, and treatment with PTX

  6. Prevention • Avoid intravascular volume depletion & maintain an effective circulating volume • Gastrointestinal bleeding • Diuretics • Diarrhea • Large-volume paracentesis without adequate volume repletion • Prompt diagnosis and treatment of infections (peritonitis, sepsis) • Bleeding and associated management • Temporary omission of nephrotoxic drugs together with appropriate adjustment of drug doses for the eGFR.

  7. Intra-abdominal pressure Sugrue et al Arch Surg 1999 134:1082 Malbrain CCM 2005;33:315 263 patients 40.7% increased IAP Renal dysfunction: 32% with IAP elevated 14% with normal IAP Albumin 20% albumin : 6-8g per 1 litre better than saline if > 6 l drained Sola-Vera et al Hepatology 2003 ;37:1147 ;50:90 Hepatorenal syndrome. Studies of the effect of vascular volume and intraperitoneal pressure on renal and hepatic function. Significant increase in urine flow rate and creatinine clearance following reduction in IAP from 22 to 10mm Hg following paracentesis

  8. Albumin Antioxidant effects and/or its high capacity to bind toxic substances

  9. Stick to basics

  10. Treatment - General Treat associated conditions • GI bleeding / hypovolaemia ( Surviving Sepsis guidelines, measurement of haemodynamics, problems associated with IAP ) • Infection • Diuretics / nephrotoxic drugs • Large volume ascites - TIPS / paracentesis • Adrenal insufficiency.

  11. Goals of treatment • Assessment for OLT should start early – HRS -1 realistic expectations, HRS-2 case by case • Prolong survival until a liver transplant becomes available and to optimize conditions for successful liver transplantation.

  12. Treatment • Vasoconstrictor therapy + “Albumin” survival versus live longer • RRT in non responders especially if OLT considered – no head to head comparison • Target portal hypertension -TIPS • MARS no evidence of benefit • OLT.

  13. Treatment Vasoconstrictors to improve circulatory function: • Vasopressin analogues • Ornipressin- improvement of renal function but limited by ischemic complications • Terlipressin - lesser incidence of ischemia • Midodrine • alpha-agonist, systemic vasoconstrictor • Noradrenaline • alpha-agonist, systemic vasoconstrictor • Octreotide • analogue of somatostatin, inhibitor of vasodilation.

  14. Vasopressin • 8-Arginine Vasopressin- Synthesised as a pro-hormone in the paraventricularand supra-optic nuclei of the hypothalamus • Migrates and stored in pars nervosa of the posterior pituitary • Vasopressin is a direct systemic vasoconstrictor (mediated by V1 receptors) • Osmoregulation and maintenance of normovolaemia (mediated by renal V2 receptors) • It also maintains haemostasis, plays a role in temperature regulation • Plasma half life of vasopressin is 24 min

  15. H cAMP AC R as Phe3 Tyr2 Gln4 ATP Cys1 Asn5 S S Cys6 Pro7 IP3, Ca2+ H Arg8 Gly9 NH2 DAG, PKC PLC R aq/11 PIP2 Vasopressin: Natural compound Functional coupling V2 V1a V1b

  16. Phe3 Tyr2 Gln4 Cys1 Asn5 S S Cys6 Pro7 Arg8 Gly9 NH2 Vasopressin: Synthetic compounds LVP Phe3 Phe3 Tyr2 Tyr2 Gly9 Gly9 Terlipressin Gln4 Gln4 AVP Cys1 Cys1 Asn5 Asn5 S S S S Cys6 Cys6 Pro7 Pro7 Lys8 Lys8 Gly9 Gly9 NH2 NH2 Gly9

  17. Pharmacology of Terlipressin • Prodrug - converted to its active form lysine vasopressin - ‘slow release’ of the vasoactive lysine vasopressin • Half–life - 6 hrs • Bolus dosage 1-2 mg 4-6 hourly ( some centres use infusion – no real benefit over boluses) • Elimination half-life - 50 min • Maximum serum concentration occurs after 120 min • Degradation by endo and exopeptidases (1% through kidneys).

  18. Vasopressin receptors

  19. Action of Terlipressin

  20. Vasopressin/ Terlipressin Increased blood volume Renal vasoconstriction Reduced GFR HRS Pathophysiology of CLD Portal Hypertension Peripheral and splanchnic arterial dilatation Reduced effective blood volume Activation of renin-angiotensin-aldosterone system Sympathetic nervous system ADH Na retention & Water retention Ascites and Oedema Low urinary Na Dilutional hyponatraemia Plasma volume expansion Ascites Schrier et al Hepatol 1988

  21. Blue fingers and toes Myocardial events Diarrhoea – gut ischaemia

  22. Vasopressin : Gut ischaemia

  23. Terlipresin +Albumin vs Albumin

  24. RCT Terlipressin in Type I HRSSanyal A Gatroenterology 2008 :134:1360 1 mg 6 hrly vs placebo Albumin in both groups If no response (30% decrease in creat) at day 4- dose doubled to 2mg 6 hrly 14 days Rx : 56 in each grp Success defined as creatinine < 1.5 mg/dl for 48 hrs by Day 14 Rx success : 34 vs 12.5 % Best Predictor – Low baseline Serum creatinine Similar survival between grps HRS reversal improved 180 day outcome

  25. Sanyal A Gatroenterology 2008 :134:1360

  26. Terlipressin and albumin vs albuminMartin-Llahi M Gastroenterology 2008:134 • 1-2 mg 4hrly • Albumin daily 1g/kg • N=23 each group • Primary outcome-Renal function & survival • Improved renal function 43 vs 8% • No difference in 2 month survival • Predictors of response – Baseline creat, treatment with terlipressin +albumin

  27. Previous studies CP score 11 Martin-Llahi M Gastroenterology 2008:134

  28. Six randomised trials were eligible for inclusion • 3 trials (total 51 patients) assessed terlipressin 1 mg bd for 2 to 15 days • Co-interventions included albumin, fresh frozen plasma, and cimetidine • Terlipressin reduced mortality rates by 34% • The control group mortality rate was 65% • Terlipressin improved renal function assessed by creatinine clearance, • serum creatinine and urine output. 2009

  29. Conclusion • Terlipressin appears to have an independent beneficial effect on HRS reversal. • Best response in those with low baseline serum creatinine • HRS at transplantation – high morbidity and mortality • Though no survival benefit, improved renal function improved post transplant outcomes.

  30. Do all patients treated with terlipressin respond ? 52% HRS respond to terlipressin (Meta-analysis: terlipressin therapy for the hepatorenal syndrome F. Fabrizi, V. Dixit & P. Martin APT 2006 24:935-44 ) • If not, can we identify those who will not respond ? • Side effect profile, implications for transplantation and development of new therapies.

  31. Best response - SCr <3.0 mg/dl Highest baseline serum creatinine in a terlipressin responder - 5.6 mg/dl. No response – SCr > 7mg/dl Will there be a response in advanced disease ?????

  32. terlipressin Hepatology 2011 placebo

  33. Predictors of response to Terlipressin

  34. Conclusions • Best response - SCr < 3 mg/dl or 3-5 mg/dl • Poor response - SCr > 7 Mg/dl • If no response by Day 4 - NO response thereafter • Sustained rise in MAP rather than only initial rise required for response • Therefore start treatment early!!!

  35. Reversal of HRS with Terlipressin

  36. Survival outcome with Terlipressin

  37. Norepinephrine for the treatment of HRS ? Duvoux et al. Hepatology 2002 HRS reversal -83% Almost all respond – Day 5 NA 0.5-3mg/h MAP >100mmHg increaase or U.O >50ml/h

  38. 22 patients : Terlipressin -12, Noradrenaline -10 HRS Reversal : Terlipressin -83%, Noradrenaline-70%

  39. Cost of noradrenaline 15 times << terlipressin 82 % nor-ad responders – Transplant 80% terlipressin responders – Transplant 80% Non-responders - DEATH Noradrenalin is as effective and safe as terlipressin in patients with HRS.

  40. Is there a single best vasoconstrictor ? NO ADVANTAGE OF ONE VASOCONSTRICTOR OVER OTHER

  41. 10 trials only type I and II 376 patients Drug ± alb vs no intervention

  42. Terlipressin + Albumin vs Albumin Vasoconstrictors + Alb : Effect on mortality at 15 days but not at 30, 90 or 180 days RR 0.6 (0.37-0.97) Terlipressin + Albumin vs Albumin : decreased mortality in type I RR 0.83 (0.65-1.05)

  43. Comparative costs

  44. Other treatments • TIPS – Transjugular Intrahepatic porto-systemic shunts • Renal Replacement therapy – Volume overload, intractable metabolic acidosis, and hyperkalemia - CRRT/MARS • Liver Transplantation ( Not all recover kidney function) • Combined Liver-kidney Transplantation.

  45. Comparison of various treatments

  46. What is my management strategy for HRS? • Differentiate between natural progression of liver disease with its complications versus acute deterioration of kidney function – HRS-1 or AKI • Fluid resuscitation • Treat raised IAP(Drain and replace with albumin) • Aggressive antibiotics (cephalosporins) • Recognise and treat precipitating factors • Once in ICU – Cardiac output monitoring, fluids, full organ support, prioritise transplant listing • Early vasoconstrictors

  47. HRS at KCH • Start with noradrenaline, if no response at 0.5 mcg/kg/min , add terlipressin 1mg 6 hourly • Monitor ischaemic side effects • Steroids for adrenal suppression • If no response by day 3 , double terlipressin 2mg • No response Day -5 stop terlipressin • RRT – fluid oveload, high lactate, acidosis • Temporary delisting if progressive MOF

More Related