Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Explain what is Aortic Arch Aneurysm ?
Aortic Arch Aneurysm : Hypothermic circulatory arrest and retrograde cerebral perfusion is the most commonly used technique for arch aneurysm. Femoral artery cannulation is used for arterial return. Separate SVC and IVC cannulation is done for venous return. While cooling on cardio pulmonary bypass, a vent'catheter is introduced through the right superior pulmonary vein. Snares are passed around superior and inferior vena cavae. After clamping the aorta, antegrade cardioplegia is given through the aortic root. While further cooling is being done, methyl prednisolone and thiopental are administered to enhance the neuroprotective effect of deep hypothermia. Mannitol and frusemide are infused for renal protection. Head is packed with ice bags and continuous EEG monitoiing is done. When nasopharyngeal temperature reaches 12-14°C and rectal temperature is 15°C to 18°C and EEG becomes isoelectric circulatory arrest can be performed. The pump is stopped and aortic clamp is removed. Retrograde cerebral perfusion through 'the superior vena caval cannula, is done from the pump at a lower pressure at a rate of 300 to 500 ml/mt, without raising jugular venous pressure above 30 to 35 mm of Hg. The arch aneurysm is opened and as retrograde cerebral perfusion is being done de-oxygenated blood will come out of the carotid arteries. This helps in reducing chances of air embolism to the cerebral arteries. Distal anastomosis of the descending thoracic aorta to an albuminimpregnated graft is done with continuous sutures. The anastomosis is usually reinforced with a narrow strip of PTFE or Dacron graft. The origins of all the three arch vessels cut out together with margins of aorta are then anastomosed to a suitably sized oval opening made on top of the tube graft. Then slowly arterial pump is re-started and blood is allowed to fill the descending aorta and arch. All air is expelled and the proximal end of the tube graft is clamped and perfusion through brachio - cephalic arteries are re-established. Retrograde cerebral perfusion is discontinued and normal cardio pulmonary perfusion and rewarming started. Proximal anastomosis with the ascending aorta is then completed and complete de-airing of heart and ascending aorta done before heart is allowed to eject and establish effective circulation.
Q. What are the different radiographic techniques used for assessing osseointegration? The different radiographic techniques used to assess osseointegration prior to stage 2 su
Explain the Mechanism of Drying? Drying as a mechanism, you will realize, involves the removal of free moisture from the surface and also moisture from the interior of the mate
(a) Hormones of the Anterior lobe - The anteriorIobe of the pituitary gland secretes the following hormones, most of them are trophic hormones. (i ) Somatotropic hormone o
Define Important Points While Working With Autoclave? Note: Following points should be kept in mind while working with autoclave. 1. Autoclave should not be packed tightly o
Q. Fluids requirement in ulcerative colitis? Fluids: A liberal intake of fluid should be given to prevent dehydration. The passage of at least 1200 ml of urine indicates that a
HMP shunt in erythrocytes HMP shunt in erythrocytes is of importance due to the generation of NADPH, which maintains the glutathione (G-SH) in the reduced state by glutathi
Explain about the Parkinson's disease? Parkinson's disease is a degenerative central nervous system (CNS) condition characterized by progressive loss of cells within substantia
What are the genes responsible for the toxic substance in bt?
Sedge-Meadow Stage - Hydrarch Favoured by an increasing amount of light, as the former occupants disappear, they gradually change the reed swamp into a sedge meadow. And now s
Q. What do you mean by Lofenalac? Lofenalac is a formula which is nutritionally complete except for phenylalanine. This formula is the main diet for the infants suffering from
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd