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

What is visual accommodation, What is visual accommodation? Visual acco...

What is visual accommodation? Visual accommodation is the phenomenon of varying the curvature of the crystalline lens to make possible the variation of its refractivity to adju

Define the symptoms of dry beriberi, Define the Symptoms of Dry beriberi? ...

Define the Symptoms of Dry beriberi? Early symptoms are similar to those found in wet beriberi. The muscles become progressively wasted and weak and walking becomes difficult.

Fat soluble vitamins, FAT SOLUBLE VITAMINS Vitamin A Vitamin A may...

FAT SOLUBLE VITAMINS Vitamin A Vitamin A may be of most practical importance in cattle feed. Vitamin A is essential for normal growth, reproduction, maintenance of epithel

What do you mean by age pyramids, Q. What are age pyramids? Age pyramid...

Q. What are age pyramids? Age pyramids are the graphical representations in form of superposed rectangles each representing the number of individuals included in age ranges int

#ti.., what would happen if there is no revolution?

what would happen if there is no revolution?

Prolactin - vertebrates, Normal 0 false false false EN-...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Explain the properties of gum karaya, Explain the Properties gum karaya ...

Explain the Properties gum karaya Gum karaya is water-swellable rather than water-soluble and absorbs water very rapidly to form viscous colloidal dispersions at low concentra

Open pulmonary valvotonzy, Open Pulmonary Valvotonzy, I nfundibular Rese...

Open Pulmonary Valvotonzy, I nfundibular Resection and Trans Annular Patch :  The pulmonary annulus may be narrow based on pre-operative investigations and on measurement

Explain about the ocular haemodynamics, Explain about the Ocular Haemodynam...

Explain about the Ocular Haemodynamics. The pressure in the ocular arteries can be measured by optical ophthalmodynamometer. The intraocular pressure is raised to the level tha

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