Cardiovascular Physiology Categorisation Drills for the exam PART 2
Anaesthesia Coffee Break
Physiology after losing one litre of blood
Lahiru categorises short, intermediate and long-term responses to ~1 L blood loss including SNS, hormones, and EPO.
Here is cardiovascular (CVS) physiology part 2 classified
If you would like to support us please do via our Patreon account.
https://www.patreon.com/anaesthesia
And best thing is that all proceeds will go to a reputable charity!
Effect of standing due to hydrostatic pressure
Compensation is Global
- Baroreceptor
o A reduction in mean arterial pressure is sensed by the baroreceptors. They decrease their rate of firing which results in an increase in SNS discharge and decreased PNS discharge causing:
o increased HR
o increased myocardial contractility ® increased CO ® increased MAP
o peripheral vasoconstriction ® increased TPR ® increased MAP (greater effect on resistance vessels than on capacitance vessels)
o venoconstriction ® increased venous return ® increased CO
- Atrial stretch
o Over an extended period of time, decreased blood volume will be sensed by the cardiopulmonary receptors as decreased stretch and decreased firing of the A and B receptors will stimulate:
o release of angiotensin, aldosterone and ADH ( Na+/H2O reabsorption, restoration of blood volume)
o increased SNS activity in the kidney (vasoconstriction, ¯ GFR and ¯ urine flow)
- Venous flow
o Skeletal muscle pump
o Valves
o Thoracic pump
- Microcirculation changes
Local
- Cerebral autoregulaton
- Myogenic mechanism
- Metabolic
- Increase O2 extraction
Please rate, post a review and subscribe!
Check out www.anaesthesiacollective.com and
sign up to the ABCs of Anaesthesia facebook group https://www.facebook.com/groups/2082807131964430
and check you the ABCs of Anaesthesia YouTube channel for more content
https://www.youtube.com/c/ABCsofAnaesthesia
Any questions please email Lahiruandstan@gmail.com
Disclaimer:
The information contained in this podcast is for medical practitioner education only. It is not and will not be relevant for the general public.
This contains general information about medical conditions and treatments. The information is not advice and should not be treated as such.
The medical information is provided “as is” without any representations or warranties, express or implied.
The presenter makes no representations or warranties in relation to the medical information on this video.
You must not rely on the information as an alternative to assessing and managing your patient with your treating team and consultant.
You should seek your own advice from your medical practitioner in relation to any of the topics discussed in this episode’
Medical information can change rapidly, and the author/s make all reasonable attempts to provide accurate information at the time of filming. There is no guarantee that the information will be accurate at the time of viewing
The information provided is within the scope of a specialist anaesthetist (FANZCA) working in Australia.
The information presented here does not represent the views of any hospital or ANZCA.
These podcasts are solely for training and education of medical practitioners, and are not an advertisement. They were not sponsored and offer no discounts, gifts or other inducements.
This disclaimer was created based on a Contractology template available at http://www.contractology.com.
The AI-powered Podcast Player
