Intracranial Pressure Monitoring In Nontraumatic Intraventricular Hemorrhage Rodent Model

Catherine Peterson; Cameron Hawk; Chloe H. Puglisi; Ben Waldau

doi:10.3791/63309

Monitoraggio della pressione intracranica nel modello di roditore emorragia intraventricolare non...

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Intracranial Pressure Monitoring In Nontraumatic Intraventricular Hemorrhage Rodent Model

Monitoraggio della pressione intracranica nel modello di roditore emorragia intraventricolare non traumatico

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08:18 min

February 8, 2022

DOI: 10.3791/63309-v

Catherine Peterson¹, Cameron Hawk¹, Chloe H. Puglisi¹, Ben Waldau¹

¹Department of Neurological Surgery,UC Davis Medical Center

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Overview

This study investigates a novel technique for monitoring intracranial pressure, mean arterial pressure, and cerebral perfusion pressure in a rat model of non-traumatic intraventricular hemorrhage (IVH). The method is designed to facilitate accurate and reliable measurements, which are crucial for evaluating the effects of IVH on cognitive functions in future research.

Key Study Components

Area of Science

Neuroscience
Pressure monitoring
Rodent models

Background

IVH can lead to increased intracranial pressure, necessitating monitoring techniques.
Existing methods in rodents are scarce in the literature.
Accurate measurements are critical for future cognitive studies related to IVH.

Purpose of Study

To establish a reliable methodology for measuring intracranial pressure in rat models.
To examine the impact of increased pressure on memory dysfunction following IVH.

Methods Used

The study employs a rat model to assess neurovascular parameters post-IVH.
Intracranial pressure was monitored using a fiber-optic sensor inserted into the cortex.
Mean arterial pressure was obtained via a sensor in the femoral artery.
Multiple surgical and monitoring steps were outlined for precise execution.

Main Results

Intracranial pressure increased significantly during IVH injections, with higher levels observed in IVH versus control groups.
Post-injection, the intracranial pressure normalized within five minutes.
Monitoring procedures established robust data for future cognitive evaluations.

Conclusions

This study demonstrates the feasibility of accurate ICP monitoring in a rodent model for studying IVH effects.
The methodology enables further exploration of cognitive dysfunctions related to increased intracranial pressure.

Frequently Asked Questions

What is the significance of measuring intracranial pressure in rodent models?

Measuring intracranial pressure is crucial for understanding the physiological responses in rodent models of brain injury, which can provide insights into similar conditions in humans.

How is the intracranial pressure measured in this study?

Intracranial pressure is measured using a fiber-optic sensor inserted into the rat's cortex, providing real-time data during experiments.

What challenges might researchers face when using this technique?

Challenges may include the small size of fiber-optic sensors and the microsurgical skills required for femoral artery dissection.

Why is it important to monitor both ICP and MAP?

Monitoring both intracranial pressure and mean arterial pressure allows researchers to assess cerebral perfusion pressure accurately, which is vital for understanding brain health and injury effects.

Can this method be applied to other brain injury models?

Yes, the methodology can be adapted for various models of brain injury to study different pathophysiological processes.

What potential insights could be gained from future studies using this model?

Future studies could elucidate mechanisms underlying cognitive dysfunctions associated with increased ICP following IVH, potentially leading to therapeutic advancements.

Il monitoraggio della pressione intracranica nei modelli di roditori di emorragia intraventricolare non traumatica non è comune nella letteratura corrente. Qui, dimostriamo una tecnica per misurare la pressione intracranica, la pressione arteriosa media e la pressione di perfusione cerebrale durante l'emorragia intraventricolare in un modello animale di ratto.

Questo protocollo descrive un metodo per misurare la pressione intracranica, la pressione arteriosa media e la pressione di perfusione cerebrale a seguito di emorragia intraventricolare non traumatica nei roditori. Le pressioni arteriose intracraniche e medie possono essere misurate in modo accurato e affidabile con un sensore a fibre ottiche inserito rispettivamente nella corteccia e nell'arteria femorale del ratto. Le tecniche qui descritte sono tradotte in ambito clinico quando i pazienti con emorragia intraventricolare richiedono un monitoraggio invasivo della pressione intracranica.

Gli obiettivi di questo studio erano di stabilire un modello animale IVH con monitoraggio obiettivo di ICP, MAP e CCP dopo IVH intraventricolare, in modo che gli autori possano applicarlo ulteriormente in esperimenti futuri che si concentreranno sugli effetti delle ICP indotte da IVH sulla successiva disfunzione della memoria. Le principali difficoltà possono includere la precisione, poiché i sensori in fibra ottica sono piccoli. La dissezione dell'arteria femorale potrebbe anche rappresentare una sfida per alcuni, in particolare quelli non utilizzati nelle abilità microchirurgiche.

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