Explain fossn ovalis defect ostium secundum defect, Biology

Assignment Help:

Explain Fossn Ovalis Defect (Ostium Secundum Defect) ?

This is the most common type of atrial septal defect.
The usual approach is through a midline incision and median sternotomy. In young girls, for cosmetic reason, approach through a submammary light thoracotorny or low and minimally invasive midline incision is used. Piece or pericardium is harvested for patch closure of the defect. Ascending aortic and bicaval cannulations are done for cardio pulmonary bypass. The operation is done at 32 to 34°C after aorta is clamped aortic root cardioplegia given.

After snaring SVC and IVC tapes, right atrium is opened parallel to atrioventricular groove. Anatomy of the defect is studied and mitral valve is inspected and tested for incompetence. When the defect is fenestrated, these strands are excised to form a single large defect. Small defects can be directly closed but a patch closure is generally preferred. The pericardial patch is first sutured to the inferior aspect of the defect between inferior vcna cava and left atrium. Great care is taken not to confuse the Eustachian valvc of' IVC with remnant qf the floor of fossa ovalis. Such an error can lead to diversion of IVC to left atrium when the operation is done under circulatory arrest without an IVC cannula. Once the lower part of the patch is anchored, the rest of the patch is sutured to the margins of the defect. Care is taken to avoid injury to the atrio ventricular node situated at the apex of the Koch's triangle.


Related Discussions:- Explain fossn ovalis defect ostium secundum defect

Winter stratification - thermal stratification, Winter Stratification - The...

Winter Stratification - Thermal stratification During extremes of winter the surface layer of the lake freezes or attains a temperature close to 0° Celsius. Under these condit

Define determinants of food security - food utilization, Define Determinant...

Define Determinants of Food Security - Food Utilization? It is the proper biological use of food, requiring a diet providing sufficient energy and essential nutrients, potable

Candidiasis, Candidiasis Candidiasis (Moniliasis) is a disease of man, ...

Candidiasis Candidiasis (Moniliasis) is a disease of man, animals and birds and is caused chiefly by Candida albicans. Crop mycosis (thrush) of poultry is caused by C. albicans

Thyroid-stimulating hormone blood level in hypothyroidism, Q. What happens ...

Q. What happens to the TSH (thyroid-stimulating hormone) blood level in hypothyroidism? Why is there enlargement of the thyroid in the endemic goiter disease? When there is low

Fowl spirochaetosis, Fowl spirochaetosis The causal agent Borrelia anse...

Fowl spirochaetosis The causal agent Borrelia anserina is a spiral-shaped organism about 8-30 um in length but commonly 14-15 um long and 0-3 um wide. The organisms are activel

Which is the type of nitrogen waste, Which is the type of nitrogen waste el...

Which is the type of nitrogen waste eliminated by beings of the class Reptilia? These beings excrete mainly uric acid. This substance is less toxic than ammonia and it can be k

Types of ribosomes, TYPE S OF RIBOSOMES Ribosomes are of two types: - ...

TYPE S OF RIBOSOMES Ribosomes are of two types: - 1 . Procaryotic Ribosomes - 70 s = Occur in cytoplasm of prokaryotes, and also in mitochondria, and Chloroplast o

Biology, how can i get an demo assignment to solve?

how can i get an demo assignment to solve?

Companion cells, Companion cells  are the specialized cells in the phloem w...

Companion cells  are the specialized cells in the phloem which load sugars into the sieve elements and help to maintain a functional plasma membrane in the sieve elements.

Show the parameters which are of interest in chd, Q. Show the parameters wh...

Q. Show the parameters which are of interest in CHD? Total Cholesterol: Serum totnl cholesterol equals the sum of HDL-cholesterol (HDL-c), VLDL-cholesterol (VLDL-c) and LDL-cho

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