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老年病人的麻醉管理PPT
Diabetes Mellitus – Tight Control of Glucose Gu. Anesthesiology 2003; 98:1359 Insulin infusions to maintain glucose: 80-150 mg/dl intraoperatively 80-110 mg/dl postoperatively Reduce ICU mortality by 40% Improve outcome from acute MI Decrease infections Beta-adrenergic Blocking Agents – Perioperative Administration Reduces myocardial ischemia Reduces myocardial infarction Secondary Observations Zaugg. Anesthesiology 1999; 91:1674 Decrease anesthetic administration Enable faster emergence Decrease post-op analgesic requirement Perioperative Myocardial IschemiaWallace. Anesthesiology 1998; 88:7 MYOCARDIAL ISCHEMIA ATENOLOL (N = 99) PLACEBO (N = 101) POD 0 - 2 17 34* * p = 0.008 POD 0 - 7 24 39** **p = 0.029 Perioperative Beta-Blockade - Therapeutic Target Auerbach. JAMA 2002; 287:1435 HEART RATE 55 – 65 bpm SYSTOLIC 100 mm Hg Before, during, and after surgery Actual Practice versus Evidenced-based Beta-blockade – “Wrong” Answers from ABA Oral Examinees DID NOT ADD IN PREOP CLINIC USED HR 80 AS TARGET INTRAOP DID NOT ORDER POSTOP (7 days) ASSUMED ESMOLOL-BOLUS = LONG-ACTING PRE-, INTRA-, POSTOP (REACTIVE vs PROPHYLACTIC) General Anesthesia Anesthetic depth Neuromuscular blocking agents Diastolic pressure Transfusion trigger Regional vs general anesthesia MAC AgeNickalls. Br J Anaesth 2003; 91:170 Nitrous Oxide MAC AgeNickalls. Br J Anaesth 2003; 91:170 End-tidal Isoflurane to Provide MAC with N2O in 80 Year OldsNickalls. Br J Anaesth 2003; 91:170 Most of Us Overdose Elderly Gas monitors Assume patient is 40 yrs old Do not know what other drugs given Do not know opioids epidurals lower MAC Underestimate brain concentration on emergence BIS Index 55-60 with beta-blockers better than BIS Index 35-45 End-tidal Concentrations Under-estimate Brain Concentrations During Emergence from IsofluraneLockhart. Anesthesiology 1991; 74:575 PROPOFOL INDUCTIONS IN 25 – 81 YR-OLDSSchnider. Anesthesiology 1999; 90:1502 Propofol: 2 mg/kg 65 y
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