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Skin Test for Horse Serum Sensitivity
Aka: Skin Test for Horse Serum Sensitivity, Horse Serum Sensitivity, Serum Sickness
- Indication
- Skin Test for Horse Serum Sensitivity prior to use
- Many antitoxins and antivenins are from horse serum
- Consider alternatives to testing
- See Premedication for Allergy Prevention
- Efficacy: Controversial in Snake Antivenin use
- Advantages to performing skin test prior to antivenin
- Possible medicolegal protection only
- Disadvantages to skin test prior to antitoxin
- Delays treatment (antitoxin administration)
- High false-positive rate: 33%
- High false-negative rate: 10 to 36%
- Has resulted in Anaphylaxis in some patients
- References
- Jurkovich (1998) J Trauma 28:1032-7
- Technique
- 0.1 ml of 1:10 dilution of antitoxin intradermal
- Inject at Forearm with 27 gauge
- Observe for Allergic Reaction for 20 minutes
- Local reaction
- Hyperemic areola at injection site > 0.5 cm
- Systemic reaction
- Fever, chills
- Hypotension with decrease Blood Pressure >20 mmHg
- Skin rash
- Respiratory difficulty
- Nausea, Vomiting
- Generalized itching
- Interpretation: If any signs of reaction
- Suggests Horse Serum Sensitivity
- Do not use antitoxin