抗生素的经验治疗（英文ppt）a randomized trial of empiric antibiotics and invasive diagnostic课件

Glutamine Therapy: What does the evidence show?,Daren K. Heyland Professor of Medicine Queens University, Kingston, ON Canada,The First Ever Recorded Clinical Trial,Nebuchadnezzar, king of Babylon, carried away children of Israel, into his court 5 And the king appointed them a daily provision of the kings meat, and of the wine which he drank: 8 Daniel would not defile himself with the portion of the kings meat, nor with the wine 10 Prince of the eunuchs said unto Daniel, I fear the king, who hath appointed your meat and your drink: for why should he see your faces worse liking than the children which are of your sort? then shall ye make me endanger my head to the king.,Book of Daniel 1:1-15,11 Then said Daniel to Melzar, whom the prince of the eunuchs had set over Daniel, 12 Prove thy servants, I beseech thee, ten days; and let them give us pulse to eat, and water to drink. 13 Then let our countenances be looked upon before thee, and the countenance of the children that eat of the portion of the kings meat: and as thou seest, deal with thy servants. 14 So he consented to them in this matter, 15 And at the end of ten days their countenances appeared fairer and fatter in flesh than all the children which did eat the portion of the kings meat.,The First Ever Recorded Clinical Trial,Book of Daniel 1:1-15,16 from all the children of Israel in the Kings Court Thus Melzar took away the portion of their meat, and the wine that they should drink; and gave them pulse.,Translating Research Findings into Practice !,Book of Daniel 1:1-16,198 RCTs Reviewed in Critical Care Nutrition Guidelines,198 RCTs Reviewed in Critical Care Nutrition Guidelines,198 RCTs Reviewed in Critical Care Nutrition Guidelines,Prolonged ICU stay, discharged weak and debilitated. Dies on day 43 in hospital from massive PE,Adequacy of EN,Case Scenario,Adequacy of EN,Why such poor adoption?,Suboptimal Patient Care?,Information Overload,Impractical for individual clinicians to assimilate massive amounts of information to make unaided judgments about complex decisions,Clinical Practice Guidelines,“systematically developed statements to assist practitioner and patient decisions about appropriate health care for specific clinical circumstances” U.S. Institute of Medicine applies to the average patient improve process of care and patient outcomes,Development of CPGs,Validity Homogeneity Safety Feasibility Cost,Evidence,Integration of Values,+,Practice Guidelines,,Updated January 2009 Summarizes 200 trials studying 15080 patients 34 topics 17 recommendations,Guidelines: Topics,EN vs PN Early vs delayed EN Dose of EN Composition of EN Arginine, fish oils Glutamine CHO/fat, Pro, fibre pH Strategies to optimize EN Feeding protocols Motility agents Small bowel feeding Body position,EN other EN in combination with PN PN vs. standard care Composition of PN BCAA Type of lipids Zinc Glutamine Strategies to optimize PN and minimize risks Use of lipids/hypocaloric Mode of lipid delivery Intensive insulin therapy Antioxidants combined selenium,,Nutrients vs. Nutrition,Impacts mortality! arginine glutamine antioxidants omega-3 fatty acids,Impacts morbidity EN vs PN Early EN small bowel feeding,Overall Effect of Glutamine supplementation,Effect of Glutamine: A Systematic Review of the Literature,Infectious Complications,Updated Jan 2009, see ,Effect of Glutamine: A Systematic Review of the Literature,Hospital Length of Stay,Updated Jan 2009, see ,Effect of Glutamine: A Systematic Review of the Literature,Updated Jan 2009, see ,Mortality,Enteral vs Parenteral Glutamine supplementation?,Why Parenteral Glutamine,Pro predictable daily dose can be added to all patients regardless gut intolerance higest level of glutamine is observed with parenteral infusion compared to enteral infusion greater treatment effect is observed with parenteral compared to enteral glutamine supplmentation Griffiths RD, Intensive Care Med 2001 Powell-Tuck J, Gut 1999 Lian-An World J Gastroenterol 2003 Novak F,. Crit Care Med 2002 Melis BrL Nutrition2005;94:19,Con unstable amino acid solutions solved with synthetic glutamine containing dipeptides costs Grimm H, Kraus A, Langenbecks Arch Surg 2001 Goeters C, Wenn A, Mertes N et al., Crit Care Med 2002,Why Enteral Glutamine?,Pro enteral feeding is preferred route of nutrition in critically ill glutamine accounts for 35% of total metabolic requirements of the enterocytes trophic effect on the small bowel and colonic mucose preserving gut barrier function by augmenting immune response reduced bacterial translocation benefficial effect on radical scavenger production (glutathione) preserving intestinal blood flow Arndt H, Kullmann F, Reub F et al., JPEN 1999 Houdijk APJ, Rijnsburger ER, Jansen J et al., Lancet 1998 Conejero R, Bonet A, Grau T et al., Nutrition 2002,Con difficult to predict and achieve daily dose because of gut intolerance problems difficult to achieve high enough plasma and tissue levels of glutamine reduction in affinity or number of transport proteins for glutamine on the surfice of the gut during sepsis reduced flow in the intestinal microcirculation impairs export of absorbed substrate across basolateral membrane decrease of absobtion function due to rapid turnover of enterocytes Griffiths, Proceedings of the nutrition Society 2001; Hall J et al., Intensive Care Med 2003,Enteral v Parenteral Glutamine Supplementation,animal model enteral glutamine supplementation reduced the severity of the methotrexsate - induced enterocolitis, maintained barrier function of the gut with reduced bacterial translocation and resulted in a decreased mortality parenteral glutamine supplement had no benifit in the same model Fox AD, Kripke SA, De Paula J et al.: Effect of glutamine supplemented enteral diet on methotrexate induced enterocolitis. JPEN 1988,Results of Subgroup Analysis,PNEN?,Luo, Clinical Nutrition (2008) 27, 297-306,Metabolic effects of enteral versus parenteral alanyl-glutamine dipeptide administration in critically ill patients receiving enteral feeding: A pilot study,RCT, double-blind IV ala-glut (0.5) vs EN ala-GLN (0.32 gm/kg/day) vs placebo 32 critically ill patients recing EN,No difference in : Antioxidant capacity (vit C, Glutathione) Oxidative stress (malondialdehyde) T lymphocytes Intestinal permeability Nitrogen balance,Concealed randomization Double-blind 72 Trauma (ISS20) Reported on 60 successful feed patients (non-ITT) Gln added to EN vs isonitrogenous control (12 days) Results Less pneumonia, bacteremia, and sepsis (majority in first week) Plasma glutamine levels elevated in Gln group in first week Lower levels of p55 and p75 soluble TNF receptors No difference in mech ventilation, LOS, mortality,Houdijk Lancet 1998;352:772,Effect of Glutamine in Critically Ill: Individual Studies,Effect of Enteral Glutamine in Burns,3 RCTs of enteral glutamine Burns patients Increased plasma glutamine Improved permeability Decreased endotoxin levels Reduced GNB infections Reduced hospital LOS Reduced mortality,Garrell CCM 2003;31:2444, Zhou JPEN 2003 27;241; Peng Burns 2004;30:135,Effect of EN Glutamine on Hospital LOS,,What about Glutamine in Head Injury?,31,Berg et al, Clin Nutr 2008 (in press),Brain Glutamine Levels,Brain Glutamate Levels,Safety of Glutamine in Head Injury?,Yang Chinese Journal of Traumatology 2007; 10:145,Efficacy of Glutamine in Head Injury?,46 patient with severe TBI randomized to IV ala-gln vs standard care ?dose All patients fed PN on day 3 with EN to follow,P0.05,What about Glutamine in Pancreatitis?,,Efficacy of Glutamine in Pancreatitis?,4 RCTs of IV Glutamine supplemented PN ? relevance when EN standard of care,What about Glutamine in Shock?,JPEN 2008;32:28,20 severely traumatized patients RCT Enteral glut 0.5 gm/kg/day vs control All patients recd Impact Started within 24 hrs and continued for 10 days,Canadian Critical Care Nutrition Clinical Practice Guidelines,“If using parental nutrition, we strongly recommend supplementing with parenteral glutamine.” “Enteral Glutamine should be considered for Burns and Trauma Patients.” “There are insufficient data to support the routine use of enteral glutamine in other critically ill patients.” Benefit of Parenteral Glutamine in Patients on EN?,JPEN 2003;27:355 see for current version,What about dose of Glutamine?,RCT 368 heterogeneous critically ill patients Double-blind Enteral nutrition supplemented glutamine: 20 grams/L Control: Glycine 20g/L Well matched groups Glutamine group recd average 19 g/day of glutamine,Hall Intensive Care Med 2003;29:1710,Inadequate Dose and Wrong Patient Population?,No differences noted,Normal Healthy range,Tjader ICM 2004,Optimal Dose?,REDOXS Dosing Study,High dose appears safe High dose associated with no