Passive Care - Ultraviolet Flashcards
Ultraviolet: Action
Thermal
Photochemical
Germicidal
Antifungal
Ultraviolet: Results
Vasodilation
Bacteriocidal
Phototaxis
Erythema - local (redness of skin caused by congestion of capillaries) due to the release of histamine (too much causes erythema ab igne)
Increases Vitamin D Synthesis (increase calcium)
Improves skin and muscle tone, elasticity, secretory functions
Stimulates metabolism
Increases reticulocytes
Ultraviolet: Indications
Skin Conditions: fungal, herpes zoster (vesicles), dematological conditions, burns, psoriasis, carbuncles, wounds, decubitus ulcers
Bone Conditions: rickets, osteomalacia
Ultraviolet: Contraindications
Hemorrhage Vascular Disease Suppurative Lesions Tetracycline SLE
Ultraviolet: Penetration
1-2 millimeters (superficial)
Ultraviolet: Frequency
High
Ultraviolet: Wavelength
Short Wave (far UV) Long Wave (near UV)
Ultraviolet: Types of UV devices
- Hot Quartz: mercury helium gases, kromayer lamp
- Cold Quartz: neon and mercury
- Orificial: sore throats, cervicitis, 10-15 seconds (goggles)
- Wood’s Lamp: aka black light, UV light filtered through nickel oxide glass used to diagnose fungal infections (tine)
Erythema Patch Test aka Sleeve
- Expose patient forearm
- Cut five penny size holes in manilla envelope
- Cover arm with manilla envelope
- 30 - 36 inches from lamp, uncover holes successively at 5 second intervals starting at 15-30 seconds
- Start treatment at time which produces a mild erythema (MED)
Erythema
SED = sub erythemal dose MED = minimal erythemal dose (starting point for treatment) 1 ED = red desquamation 2 ED = blister desquamation 3 ED = blister, char, desquamation
Erythema Related To:
- Patient Sensitivity
- Intensity (vs) Distance (inverse square law)
- Angle of Radiation (cosine law)
Further Treatment:
- As patient tolerance increases, increase duration by 15 sec/tx to a max three minutes
- When this maximum has been reached, decrease the distance by two inches per treatment, approaching no loser than 18 inches
What treatment do you start with?
MED
minimal erythemal dose
What is the maximum treatment?
3 minutes at 18 inches
What is the difference between UV and Infrared?
Infrared does NOT have photochemical, germicidal or anti fungal properties
With UV only the patient wears glasses, with Infrared both patient and doctor wear glasses