![physiological dead space physiological dead space](https://www.medassignments.com/wp-content/uploads/2015/10/Untitled657.png)
Thanks for going the extra mile to explain this equation to me. That is an awesome explanation thanks a lott Cyra!
#PHYSIOLOGICAL DEAD SPACE PLUS#
Physiologic dead space includes the anatomic dead space plus any alveoli that are not perfused and thus cannot participate in gas exchange. Anatomic dead space includes the non-respiratory airways and exists in all healthy lungs. Anatomic deadspace is the total volume of the conducting airways from the nose or mouth down to the level ofthe terminal bronchioles, and is about 150 ml on the average in humans. Comparison of Anatomic and Physiologic Dead Space: Dead space refers to those areas of the lung not involved in gas exchange. There are two different ways to define dead space- anatomic and physiologic. In physiology, dead space is the volume of air which is inhaled that does not take part in the gas exchange, either because it (1) remains in the conducting airways, or (2) reaches. In thirteen patients the physiological deadspace: tidal volume ratio and the alveolar to arterial oxygen tension difference have been measured immediately. However, in disease states where portions of the lung are poorly perfused, the physiologic dead space may be considerably larger than the anatomic dead space.That is why physiologic dead space is a more clinically useful concept than is anatomic dead space. Dead space is the portion of each tidal volume that does not take part in gas exchange. The formula for Physiological Tidal Volume is: V T V D + V A. In healthy individuals, the anatomic and physiologic dead spaces are roughly equal since all areas of the lung are well perfused. Physiological dead space (Vds), end-tidal CO2(Pet CO2 ), and arterial CO2(PaCO2 ) were measured at 1 and 2.8 ATA in a dry hyperbaric chamber in 10 older. Therefore.Vd = PaCO2 - PeCO2 and Vt = PaCO2.and if you want to figure the diluting effect out,you just divide the two.and end up with the equation. By measuring the PCO2 in the communicating alveoli (which is the same as that in the arterial blood) and the PCO2 in the expired air, one can use the Bohr Equation to compute the "diluting," non-CO2 containing volume, the physiologic dead space. Physiologic dead space is anatomic dead space(conducting airways from mouth or nose to the terminal bronchioles) plus alveoli which are well ventilated but poorly perfused and therefore less efficient in gas exachange.Because atmospheric PCO2 is practically zero, all the CO2 expired in a breath can be assumed to come from the communicating alveoli and none from the dead space.
![physiological dead space physiological dead space](https://image1.slideserve.com/3561516/physiologic-dead-space-n.jpg)
PaCO2=arterial PCO2 PeCO2=expiratory artial pressure of CO2 The equation is Bohr Equation.you will be able to understand it better if you look at it this way.(write it down on a piece of uldn't manage the horizontal div line.have to make do with the forward slash!)