Anaesthesia Fundamentals | Physiology | Physiology of nausea and vomiting
Physiology of Nausea and Vomiting
Session Overview
Description
This session describes the physiology of nausea and vomiting. Topics covered include swallowing reflex, barrier pressure, agonist/receptor systems, afferent and efferent pathways and causes and consequences of postoperative nausea and vomiting.
Learning Objectives
By the end of this session you will be able to:
- Describe the normal swallow reflex
- List factors which influence barrier pressure
- Draw a basic diagram explaining the interaction between the vomiting centre and chemoreceptor trigger zone
- Describe the phases of the vomiting reflex
- Discuss the different mediators and their receptors involved in nausea and vomiting
- Discuss the risk factors for nausea and vomiting in both adults and children
- Describe the consequences of nausea and vomiting of relevance to the anaesthetist
Nausea and vomiting are commonly encountered in anaesthesia, intensive care and pain medicine. They can occur secondary to disease processes or as a side-effect of surgical intervention or medicines.
Vomiting is co-ordinated through the brainstem which receives multiple afferent signals. Several transmitter/receptor systems are involved.
Because animal studies have provided much of our knowledge in this area, the neural mechanisms involved in nausea remain poorly understood.
- Anaesthesia | Transfer | Modes of Transport
- Posted By eIntegrity Healthcare e-Learning
- Posted Date: 2024-12-22
- Location:Online
- This session considers the transport options available to critical care teams for the secondary and tertiary transfer of critically-ill patients.
- Anaesthesia | Sepsis | Resuscitation and treatment...
- Posted By eIntegrity Healthcare e-Learning
- Posted Date: 2024-12-22
- Location:Online
- This session describes the initial resuscitation for the patient with sepsis and septic shock. It focuses on the resuscitation and initial cardiovascular management of sepsis.
- Anaesthesia | Sepsis | Assessment and differential...
- Posted By eIntegrity Healthcare e-Learning
- Posted Date: 2024-12-22
- Location:Online
- This session describes how to assess a patient with suspected sepsis and recognize the differential diagnoses in suspected sepsis both on admission to hospital and in hospital.
- Anaesthesia | Sepsis | Sepsis Pathophysiology
- Posted By eIntegrity Healthcare e-Learning
- Posted Date: 2024-12-22
- Location:Online
- This session provides an overview of the pathophysiological processes that underpin normal immune response to infection. It then outlines how these contribute to the development of sepsis.
- Anaesthesia | Recognition of the critically ill pa...
- Posted By eIntegrity Healthcare e-Learning
- Posted Date: 2024-12-22
- Location:Online
- This session defines the mortality rate for patients admitted to ICUs in the UK and discusses important aspects of severity of illness scoring systems that are applied to this population. This session also looks at the longer-term non-mortality outcomes e