Related Experiment Videos
Age-related differences in acute physiologic response to focal traumatic brain injury in piglets
S R Durham1, R Raghupathi, M A Helfaer
1Department of Neurosurgery, University of Pennsylvania School of Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pa., USA. durhamsr@mail.med.upenn.edu
Insights
Youngest piglets showed increased cerebral blood flow (CBF) after traumatic brain injury (TBI), unlike older piglets who experienced decreased CBF. This suggests age-related differences in TBI response.
Area of Science:
- Neuroscience
- Physiology
- Developmental Biology
Background:
- Traumatic brain injury (TBI) affects individuals of all ages.
- Understanding age-related vulnerability to TBI is crucial for developing targeted treatments.
- Physiologic responses to TBI may differ across developmental stages.
Purpose of the Study:
- To investigate age-related differences in acute physiological responses to scaled cortical impact injury.
- To determine if these differences contribute to varying vulnerability to TBI.
- To analyze the impact of age on heart rate, mean arterial pressure, brain temperature, and cerebral blood flow post-injury.
Main Methods:
- Utilized a scaled cortical impact model in piglets of three age groups: 5 days, 1 month, and 4 months.
- Monitored heart rate (HR), mean arterial pressure (MAP), brain temperature (BrT), and cerebral blood flow (CBF) at baseline and for 3 hours post-injury.
- Compared physiological responses across different age groups.
Main Results:
- No significant age-dependent variations were observed in HR, MAP, or BrT following injury.
- Cerebral blood flow (CBF) demonstrated a significant age-dependent response.
- Youngest (5-day-old) piglets exhibited increased CBF, while older piglets (1 and 4 months) showed decreased CBF post-injury (p = 0.0049).
Conclusions:
- Cerebral blood flow (CBF) response to traumatic brain injury (TBI) is significantly influenced by age.
- Youngest animals display a distinct physiological response characterized by increased CBF after TBI.
- These findings highlight age-specific vulnerability and response patterns to TBI.
Introduction:
The goal of the present study was to determine whether age-related differences in the acute physiologic response to scaled cortical impact injury contribute to differences in vulnerability to traumatic brain injury (TBI).
Methods:
Heart rate (HR), mean arterial pressure (MAP), brain temperature (BrT) and cerebral blood flow (CBF) were measured in 22 piglets (7 of age 5 days, 8 of age 1 month, 7 of age 4 months) at baseline and for 3 h following scaled cortical impact injury.
Results:
There were no age-dependent variations from baseline in HR, MAP or BrT following injury. CBF increased in the 5-day-old animals following injury while CBF in the 1- and 4-month-old animals decreased following injury (p = 0.0049).
Conclusion:
CBF was shown to have a significant age-dependent response to TBI with the youngest animals exhibiting increased CBF following injury.