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Body has 120 liters of CO2 At IAP 15 ; flow of 200ml/hr CO2 absorbed is
20 to 30 ml/hr CO2 Absorption is maximum in first ½ hr Carbonic Acid – Shoulder pain Induces hypothermia – 0.3 C/50 lit of CO2
Shivering
Kendall Ap Anesthesilology 1996; Bures EP Brit J Anes 2010
Liquid Diet – previous day2 Tab Dulcox – HSNo Peglec (It causes Gaseous distention)Liquid diet – Fluid in bowel ; hence easily displaced
Alpha2 receptor agonist Noradrenaline Renin Medulary pathways - vasomotor control Stress & serum cortisol
Quintin L – Anesthesiology 1991; Hayashi Y Br J Anes 1993
Route Oral (3-5Microgram) I V(1-2 Microgram)
Dose 3 to 5 micro 1 to 2 micro
Time 60 to 90 min 10 to 14 min
Effectivity Not sure Sure
Fix schedule Compulsory Not must
Titration Not Possible possible
Brimacombe J. The advantages of the laryngeal mask airway over the tracheal tube or facemask; A meta analysis. Can J Anaesth 1995; 42: 1019.
. Shribman AJ, Smith G, Achola KJ., Cardiovascular and catecholamine responses to laryngoscopy with and without tracheal intubation. Br J Anaesth 1987: 59 : 295 - 9.
Pennant JH, White PF; The laryngeal mask airway, its uses in Anaesthesiology.
Anesthesiology 1993; 73 : 144 - 63.
Parameters Controls Study p – Value* HR 113.04 ±6.03 109.60 ±8.53 0.0531
SBP 136.56 ±9.30 115.28 ±10.06 0.0001 DBP 94.32 ±6.82 79.52 ±7.35 0.0001
RPP 15466.08 ±1634.58 12645.28 ±1568.48 0.0001
MAP 108.40 ±7.00 91.44 ±6.18 0.0001
There was rise in all the parameters in both the groups but the rise was significantly low in the study group (p < 0.05)
(Student t test)
n =200
Parameters Control (ET) Study (LMA) p – Value
HR 112.40 ±8.04 106.96 ±16.02 0.0690
SBP 132 ±8.20 112.64 ±8.67 0.0001
DBP 93.76 ±6.72 78.08 ±7.93 0.0001
RPP 14865.92 ±1695.23 11997.68 ±1656.80 0.0001
MAP 106.51 ±6.61 89.60 ±7.01 0.0001
Student t test
The parameters in the study group were not significantly increased (p < 0.05)