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Nurses' Papers on Tuberculosis Part 9

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THEORIES OF TUBERCULIN REACTION

_a_ ROBERT KOCH ascribes the tuberculin reaction to the increased necrotic process around the tubercle, the histological changes consisting of hyperaemia, exudation and softening.

_b_ EHRLICH considers the formation of antibodies an essential feature in the mechanism of reaction. Formation of antibodies takes place in the middle of the three layers encircling the tubercle, the layer damaged by toxins, but not yet rendered incapable of reaction.

_c_ Wa.s.sERMANN maintains that the ant.i.tuberculin found in the tuberculous process draws the injected tuberculin out of the circulation to the tuberculous focus. The interaction that takes place between ant.i.tuberculin and tuberculin results in formation of ferments which digest alb.u.min, resulting in the softening of tissue. Absorption of softened tissue causes fever.

_d_ CARL SPENGLER--Toxins in the blood of the tuberculous are kept in check by antibodies. Injected tuberculin unites with antibodies, thus setting the toxins free. Result--autointoxication.

_e_ WOLFF-EISNER--Bacteriolysin is present in the organism of the tuberculous, as result of previous infection; bacteriolysin sets free the potent substances of the injected tuberculin; this acts on the body and the tuberculous focus, producing a reaction.[10]

TUBERCULIN TESTS

I. SUBCUTANEOUS (hypodermic); introduced by Robert Koch in 1890.

II. CUTANEOUS; introduced by Von Pirquet in 1907.

III. CONJUNCTIVAL (ophthalmic); introduced about the same time by Wolff-Eisner and Calmette in 1907.

IV. PERCUTANEOUS (inunction or salve); introduced by Moro in 1908.

V. INTRACUTANEOUS (needle track reaction); introduced as a test by Mantoux in 1909. Described previously by Escherich.

I. SUBCUTANEOUS TUBERCULIN TEST

1. APPARATUS AND SOLUTIONS NECESSARY:

Gla.s.s cylinder graduated to cc.

1 cc pipette graduated to 1/10 cc.[11]

10 cc pipette graduated to 1/10 cc.[12]

Hypodermic needle suited to the syringe.

Two or more 1/2 oz. bottles.

1/2% carbolic acid solution.

Normal salt solution.

1 cc. Old Tuberculin.

2. PREPARATION OF APPARATUS:

Gla.s.s apparatus, syringe and needles boiled before use.

Some keep needles and syringe in 95% alcohol.

3. MAKING SOLUTIONS:

Tuberculin No. I: Tuberculin No. II:

Label one bottle Another

_.1 cc. = 1 mg. T_ _.1 cc. = .1 mg. T_

No. I { Put 0.1 cc. T in bottle No. I { Add 9.9 cc. of 1/2% carbolic acid solution

{ Put 1 cc. of Tuberculin solution from No. II { No. I into bottle No. II { Add 9 cc. of 1/2% carbolic solution

In making dilutions you may use your syringe instead of pipette.

Dilutions can be kept _one week_ in a dark, cool place.

Discard turbid solutions.

4. PREPARATION OF THE PATIENT FOR THE TEST:

Patient to keep quiet in bed, or reclining chair, for two or three days before injection.

Take temperature every two or three hours for two or three days (daytime).

If the test is to be applied, highest temperature should not be above 99.1 F, by mouth, according to Koch; not above 100 F, according to others.

Site of injection--back, below the level of the shoulder blades, alternately on the two sides.

Rub skin with ether or alcohol.

An exact record of physical signs, _just before injection_, should be made by the physician.

5. TIME OF INJECTION:

Between 8 and 10 A. M. (Bandelier and Roepke).

Late in the evening, 9 or 10 P. M., or later (others).

6. DOSE:

According to Koch: Begin with 1/2 mg., or 1 mg., according to condition of patient; give larger dose if no reaction. Order of increase: 1 mg.; 5 mg.; 10 mg. (last dose repeated if necessary).

Interval between injections: two or three days.

Present Usage: First dose in adults, 1/2 mg., or 1/5 mg., or smaller, according to physical condition.

First dose in children: 1/10 mg., or 1/20 mg., or even smaller.

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