Monro Kellie Doctrine Definition

Monro secundus 1783 1824 george kellie was an edinburgh based surgeon and former student of monro. Monro kellie hypothesis mun ro kel e an explanation of the maintenance of intracranial pressure.

Figure 1 From Monro Kellie 2 0 The Dynamic Vascular And Venous

Monro kellie hypothesis is a pressure volume relationship that aims to keep a dynamic equilibrium among the essential non compressible components inside the rigid compartment of the skull 1 3.

Monro kellie doctrine definition. The skull is viewed as a closed container housing brain tissue blood and cerebrospinal fluid. Monro kellie doctrine. The monro kellie doctrine was first described by dr alexander monro and dr george kellie.

The volume of these three components remains nearly constant. His contribution to the doctrine stems from papers he published on the post mortem examination of two individuals that were found deceased in leith the morning after a winter storm. The monro kellie hypothesis states that the cranial compartment is inelastic and that the volume inside the cranium is fixed.

More than two centuries ago alexander monro applied some of the principles of physics to the intracranial contents and for the first time hypothesized that the blood circulating in the cranium was of constant volume at all times. In its original form the hypothesis had shortcomings that prompted modification by others. A change in any of these three components will affect the other two.

Part of a series of videos on icp manageme. If the volume added to the cranial vault is equal to the volume displaced the. This hypothesis was supported by experiments by kellie.

The cranium or neurocranium describes the part of the skull encasing the brain made up of 8 bones frontal ethmoid. It describes the relationship between the contents of the cranium and intracranial pressure. If an increase occurs in the volume of one component the volume of one or more other components must decrease or icp will be elevated.

More than two centuries ago alexander monro applied some of the principles of physics to the cranial cavity and for the first time hypothesized that the blood circulating in the cranium was of constant volume at all times. A short animation covering some of the basic theory of icp intracranial dynamics and the monro kellie hypothesis. The average intracranial volume in the adult is around 1700 ml composed of brain tissue 1400 ml csf 150 ml and blood 150 ml 3 4.

The monro kellie doctrine states that the skull is a rigid compartment and contains three components. Brain blood and cerebrospinal fluid. Mŏn rō a doctrine that states that the cranial cavity is a closed rigid box and that therefore a change in the quantity of intracranial blood can occur only through the displacement of or replacement by cerebrospinal fluid.

What finally came to be known as the monro kellie doctrine or hypothesis is that the. This hypothesis was supported by experiments by kellie. The pressure volume relationship between icp volume of csf blood and brain tissue and cerebral perfusion pressure cpp is known as the monro kellie doctrine or hypothesis.

Monro Kellie Hypothesis Radiology Reference Article