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21 Cards in this Set
- Front
- Back
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average iop
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15.4 mmHG
between 10.5-20.5 mmHg |
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what happens to iop when the aterial pressure decreases?
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iop decreases however small impact
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What happens when local arterial pressure decreasele systemic aterial pressure is unchanged?
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the iop increases
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what is the main cause of iop determinant? t
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balance of inflow and outflow NOT vasopressure
main cause is outflow facility or resistance |
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increase of episceral venous pressure
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increase IOP
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increase ooutflow resisterance
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increase IOP
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decrease out flow due to
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increase of IOP (collapse schlemm and tm lamina)
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spontanous venous pulsation r
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-increase of iop in systole collapses vien
-decreases IOP with diastole vietn refills - seen with opthalmoscope - may disappear with low IOP - exaggerated with pressures on globe |
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when does SVP disappear
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when central retinal venous pressure is greater than iop
-occurs when increase of ICP |
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aterial pressure
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changes IOP by 1-2 mmHg
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aterial pressurer
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blood volume and iop increase with systole
small iop rhythmic fluctation |
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diuranal cicadian varition of IOP usualy ranges from?
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4-5 mmHg
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IOP is sually higher in ?
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morning
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glaucoma pt IOP varries from?
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8 mmHg
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what are associated with increase of IOP
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- transerient HTN
- high water comsumption - posture recline - blinking - eom contration -intraopbrital congestion fat-fibrosis - valsalva - age - metabolic alkalosis |
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drugs that increase IOP
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- caffiene
- nictoine - steroids |
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decreases aqueious secretion
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- age
- diurnal - exercise ( short term) |
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decreases the aqueous secretion systemically
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decrease bp
hypthmeria acidosis gernal anesthetics uveitis |
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decrease the aqueous secretion locally
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increase iop
uveitis rentinal detachement retrobulbar anethetic choridal detachment |
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decrease iop
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inflammation - prostaglandin
retinal detachment metabolic acidosi (hold breath) anesthetics hypthermai pregnancy |
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what controls IOP
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convnetional outflow facility- tm
aq fomration and secretion uveoscleral out flwo hyperosmotic |
