Describe shunts, Biology

Assignment Help:

Q. Describe Shunts?

Detection, localization and quantification of intracardiac shunts are one of the most important exercises in cardiac catheterization. In most cases a preliminary clinical evaluation will give us knowledge of the possible intracardiac shunt.

The pointers to the presence of a shunt are:

1) Unexplained arterial desaturation (arterial saturation < 95 per cent) suggestive of a right to left shunt and representing alveolar hypoventilation.

2) Unexpectedly high pulmonary artery saturation > 80 per cent-suggestive of a left to right shunt.

3) When data at catheterization does not confirm a particular lesion.

Detection of left to right intracardiac shunts-Measurement of blood oxygen saturation and content in the right heart (oximetry run) Oximetry run is a basic technique for detecting and quantifying intracardiac shunts.

The oxygen content or per cent saturation is measured in blood samples drawn sequentially from PA, RV, RA, SVC and IVC. A significant step-up is defined as an increase in the blood oxygen content or saturation that exceeds the normal variability that might be observed if multiple samples were drawn from that cardiac chamber. Oxygen content can be calculated from the knowledge of percentage saturation, the patient's hemoglobin concentration and an assumed constant relationship for oxygen carrying capacity of hemoglobin (1.36mL O2/g hemoglobin).


Related Discussions:- Describe shunts

Bovine spongiform encephalopathy (bse), B o vi n e spongiform encephalo...

B o vi n e spongiform encephalopathy (BSE) Bovine spongiform encephalopathy (BSE) is a transmissible, neurodegenerative, fatal brain disease of cattle characterized by post

State fluid exchange between blood plasma in a capillary, Which of the foll...

Which of the following statements are true for fluid exchange between the blood plasma in a capillary in the leg and the interstitial spaces surrounding that capillary? A. Bloo

Define significance of plants and animals on human life, Define Significanc...

Define Significance and Impact of Plants and Animals on Human Life? Plants and animals both have a great significance and unparalleled impact on human life. Most of our needs a

Prevention of iron deficient anaemia, Prevention   You as nurse needs t...

Prevention   You as nurse needs to ensure that iron supplementation  is given to children who are at risk for iron deficiency.  Iron supplementation  should start between 4 and

What are the major functions of the blood, Q What are the major functions o...

Q What are the major functions of the blood? The blood is a means of substance transportation throughout the body. The blood distributes hormones, nutrients, oxygen, cells and

Explain about selection of healing abutment, Selection of healing abutment ...

Selection of healing abutment It is done depending upon the tissue thickness. Tissue thickness can be measured similar to ridge mapping or sounding procedure, wherein after an

What an enzyme is called, The substance that is worked on by an enzyme is c...

The substance that is worked on by an enzyme is called: a. product b. coenzyme c. substrate d. inhibitor

Cilia and flagella – protozoans, Cilia and Flagella – Protozoans Cilia...

Cilia and Flagella – Protozoans Cilia and flagella basically have a similar structure and distinction between the two on structural basis does not exist. There is a filament o

Properties of cardiac cells, Properties of Cardiac Cells Automaticall...

Properties of Cardiac Cells Automatically: ability of the heart to initiate impulses regularly and spontaneously. Excitability: ability of cardiac cells to respond to

Nurse''s role during phototherapy, Nurse's Role During Phototherapy Y...

Nurse's Role During Phototherapy You should take care of following while nursing the baby in receiving phototherapy. Check the lights of phototherapy unit before use and

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd