DOD A-A-54044-1989 TONOMETER OPHTHALMIC SCHIOTZ《眼科张力计》.pdf
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1、A-A-54044 65 7777774 0033357 A-A-54044 30 Nov 1989 COMMERCIAL ITEM DESCRIPTION TONOMETER, OPHTHALMIC, SCHIOTZ The General Services Administration has authorized the use of this Commercial Item Description to replace Federal Specification GG-T-585B which is being cancelled. This commercial item descr
2、iption covers a mechanical tonometer suitable or measuring intraocular pressure. Salient characteristics: General. The tonometer furnished under this document shall be of Schiotz design using no electrical power. Scale reading is obtained in proportion to the cornea pressure. Weights are added to th
3、e instrument for expanding the scale range. Materials. Frame. Aluminum alloy No. 2024 or No. 6061. All temper-ed for the purpose intended. Scale Support. Etched aluminum alloy. Pointer. Spring steel or hard-drawn stainless steel. Scale. Permanently printed on a plastic strip. Remainder components. B
4、right chrome plated over brass. Case. High impact resistant material. Form fitting pad or molded insert. AMSC N/A FSC 6540 DISTRIBUTION STATEMENT A. Approved for public release; distribution O is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS
5、-,-,-A-A-54 O 4 4 Style, design and dimensions. The mechanical tonometer shall be Schiotz design as approved by the Committee on Standardization of Tonometers of the American Academy of O?hthalmoogy and Otolaryngology. The instrument shail consist of a rigid housing having a liinited vertical motion
6、 within the retaining handle. There shall be a freely-moving plunger within the housing. This plunger shall carry weight or weights as described hereinafter, and shall transmit its vertical motion to a pointer by means of a lever. The motion so transmitted shall be measured by means of a scale locat
7、ed at the top of the instrument and over which the pointer shall pass. least -1 to at least 715 in one unit steps. The scale shall be graduated from at Weights. Four weights shall be supplied with the instrument. One weight marked “5.5“ shall be secured to the plunger by clipping action. The other t
8、hree weights shall be furnished: one 2-gm. weight marked “7.5“, one 4.5-gm weight marked irlO“, and one y.5-grn weight marked “15“. The weights shall each have a tolerance of + 0.02 gm. These weights shall be put on or off easily yet they-shall be secured to the shaft. Dimensions. Dimensions shall b
9、e in accordance with the specification 5 or latest edition for tonometer, as published by the Committee on Standardization of Tononmeters of the American Academy o Ophthalomology and Otolaryngology. Where dimensional requirements contained in this specification are in confiict with the committees la
10、test specification, the latter specification shall govern, Dimensions are given in milimeters imm). Footplate Diameter Radius of concavity Diameter of Footplate hole -i- 0.2 -i- 0.25 3.7 - 0.5 10.1 - 15.0 - Plunger Diameter 3.0 - -i- 0.03 + 0.75 Radius of concavity of base 15.0 - . Extension of plun
11、ger below spherical surface of footplate 3 maximum Pointer Depth Thickness Distance between scale and point er 3 maximum 0.25 maximum 1.0 maximum 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- A-A-54044 65 7777774 OOL3LbL b m, A-A-54 04 4 Hammer
12、Plunger contact with hammer smooth, free from . pits throughout usable scale - Scale. Each scale unit shall equal 0.050 mm of plunger displacement. The tonometer scale shall extend from -1.0 at least + 15.0 in 1 mm increments. A test block shall be supplied in the case with each tonometer. The tonom
13、eter when resting on the convex surface of the test block shall give -a reading of 0.00 + 0.15. The scale shall be calibrated so that the plunger displacement in mm from -1.0 scale reading shall be as follows: Scale Reading Plunger Displacement 5.0 10.0 15.0 0.30 + 0.01 0.55 t 0.015 0.80 T - 0.03 Fi
14、nish. The finish shall be mirror, or mirror and satin, except the pointer, which shall be given a blue or black finish. As an alternate, frame shall be fine sandblasted and anodized. Finish shall be such that it will not chip. Chart. A chart converting scale units to mm of mercury shall be furnished
15、 with each instrument in printed form. a Case. Each instrument shall be provided with a molded insert or lined case suitably fitted to securely retain the instrument and accessories. Outside dimensions of the case shall not exceed 6-1/2 X 4-1/4 X 1-3/16 inches. Identification marking. Each instrumen
16、t shall be permanently and legibly marked with the manufacturers name or trademark of such known character that the source of manufacture may be readily determined. Serial number shall be marked on the scale support. Instructions or Disinfecting and Cleaning Mechanical cleaning mechanical tonometers
17、 as approved by the Committee on Standardization of Tonometers of the American Academy of into each instrument case: v Tonometers. The following instructions for disinfecting and . Ophthalmology and Otolaryngology shall be furnished and packed z a -. 3 Provided by IHSNot for ResaleNo reproduction or
18、 networking permitted without license from IHS-,-,-A-Am54 04 4 Disinfection. In order to avoid the transference of infectious bacteria or viruses from one patient to another, the end of the mechanical tonometer coming in contact with the eye shall be Chloride Solution (U.S.P.1 so that the mechanical
19、 tonometer footplate and plunger remain immersed in this disinfecting solution during the period of day in which the tonometer is in use. The instrument shall not be left in the disinfecting solution overnight. Since the disinfectant may be slightly irritating to the eye, the footplate and the lower
20、 end of the plunger shall be washed with distilled water and wiped dry with gauze sponge immediately before use. If a suitable stand is not available, the mechanical tonometer footplate and lower end of the plunger shall be wiped with a gauze sponge moistened with 1- 5000 Benzalkonium Chloride Solut
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