determination of physiological dead space quesion

The alveoli will contain some of the oxygen which was Is the dead space, it will contain pure oxygen. Initially, as the individual has inspired 100% oxygen, the exhaled gas will not contain nitrogen, as this A graph is produced of % nitrogen in expired air against the OnĮxpiration he breathes out through a valved box fitted with a rapid nitrogen analyser, which records theĬoncentration of nitrogen at the mouth. the volume of the conducting airways only).Ī subject breathes one breath of 100% oxygen, this is done to rid the conducting zone of nitrogen.

Determination of Anatomical Dead Space (i. We will review the answers in the second session. Question: Can you think of anything that may also increase the size of the conducting zone?īefore the session next week read through the following information and attempt to answer the Question: Can you define the following 3 types of dead space?

Ventilation,” the volume of the dead space needs to be determined. With each tidal volume about a third of the total amount of gas entering into the airways and lung does Total ventilation (minute volume) = Tidal volume x Respiratory rate There are about 300 million alveoli present within an average lung.

The volume of this zone isĪbout 2-3 litres. This is known as the respiratory zone where gas exchange occurs. In an average adult the volume of this space isįrom generation 17 onwards, small alveoli bud off the bronchi, these are where gas exchange takes

The first 16 generations are termed the conducting zone, no bronchi in his region take part in gasĮxchange and this forms the anatomical dead space. Thisdivides into the left and right major bronchiĪnd the bronchi divide 23 times in total in order to increase the surface area available for gas exchange. The larynxĬonducts the gas into the trachea (and aids speech). The nose, mouth and pharynx conduct air to the larynx, humidify and filter the air gases. Make the process as efficient as possible. To maintain gas exchange function, the anatomy of the respiratory system is designed in such a way to 5BM009: Integrated Physiology Problem Based Learning (PBL) Tutorial 5 ‘Respiration: Dead Space’ Introduction

Determination of physiological dead space quesion