Global Health and Health Policy 50 Lecture 1: Concussion

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thestudygeek

2 Nov 2021

School

Harvard University

Department

Global Health and Health Policy

Course

Global Health and Health Policy 50

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Document Summary

Pathophysiology: trauma to the head causes diffuse soft tissue damage. Cause: trauma to head, fall, sports-related, mva, sudden acceleration / deceleration of the head. Complications: delayed hematoma, post-concussion syndrome, headache, dizziness, difficulty thinking, seizure, persistent vomiting, hemorrhage, post-trauma vertigo. Manifestations: tenderness on skull palpation, evidence of external trauma, vacant stare, slurring / incoherent speech. Diagnostics: ct / mri to rule out more serious injury. Treatment: observation for mental status decline, bed rest until symptom-free, cognitive rest, avoidance of further injury.

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Pathophysiology question!

Traumatic brain injury such as concussion results when the headundergoes a very large acceleration. Generally, an accelerationless than 800 m/s2 lasting for any length of time will not causeinjury, whereas an acceleration greater than 1000 m/s2 lasting forat least 1 ms will cause injury. Suppose a small child rolls off abed that is 0.38 m above the floor. If the floor is hardwood, thechild's head is brought to rest in approximately 1.9 mm. If thefloor is carpeted, this stopping distance is increased to about 1.0cm. Calculate the magnitude and duration of the deceleration inboth cases, to determine the risk of injury. Assume that the childremains horizontal during the fall to the floor. Note that a morecomplicated fall could result in a head velocity greater or lessthan the speed you calculate.

Hardwood floor magnitude	m/s2	duration	ms
Carpeted floor magnitude	Your response differs from the correct answer by more than 10%.Double check your calculations. m/s2	duration	Your response differs from the correct answer by more than 10%.Double check your calculations. ms

Traumatic brain injury such as concussion results when the headundergoes a very large acceleration. Generally, an accelerationless than 800 m/s2 lasting for any length of time will not causeinjury, whereas an acceleration greater than 1000 m/s2 lasting forat least 1 ms will cause injury. Suppose a small child rolls off abed that is 0.36 m above the floor. If the floor is hardwood, thechild's head is brought to rest in approximately 1.9 mm. If thefloor is carpeted, this stopping distance is increased to about 1.2cm. Calculate the magnitude and duration of the deceleration inboth cases, to determine the risk of injury. Assume that the childremains horizontal during the fall to the floor. Note that a morecomplicated fall could result in a head velocity greater or lessthan the speed you calculate.

Hardwood floor magnitude 1 m/s2 duration 2 ms

Carpeted floor magnitude 3 m/s2 duration 4 ms

Global Health and Health Policy 50 Lecture 1: Concussion

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