DOD A-A-54772-1992 STETHOSCOPE COMBINATION TYPE LIGHT WEIGHT《轻量合并类听诊器》.pdf

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1、A-A-5Y772 m 9999974 0320959 664 A-A-54 7 7 2 31 December 1992 COMMERCIAL ITEM DESCRIPTION STETHOSCOPE, Combination Type, Light Weight The General Services Administration has authorized the use of this commercial item description as a replacement for MIL-S-36588A which is cancelled. This commercial i

2、tem description covers requirements for lightweight, bell-diaphragm, combination stethoscopes suitable for diagnostic analysis. Salient characteristics: Scope. Stethoscopes covered by this document shall be of the following sizes: Size 1 - Adult Size 2 - Child Requirements. a binaural section with t

3、ubing and a chestpiece. Each stethoscope shall be fully assembled and supplied with two pairs of ear tips and two extra diaphragms. The stethoscope shall be approximately 24 inches in length. The weight of the stethoscope shall not exceed 4.6 ounces. The stethoscope shall essentially consist of Bina

4、ural section. The binaural section shall consist of two aural tubes, a steel spring, tubing and two ear tips. The aural tubes shall be fabricated of chromium plated or chromium over nickel plated brass tubing. of each tube shall have external threads to receive and securely hold the ear tips. The di

5、stal ends of the tubes shall have suitable means for securely retaining the plastic tubing. The aural tubes shall be held together by means of a steel spring. With the steel spring assembled, the aural tubes shall be rotationally adjustable. The steel spring shall bo “U“ shaped and fabricated of cor

6、rosion resistant steel or carbon steel with chromium or chromium over nickel plating. The proximal end msc N/A FSC 6515 DISTRIBUTION STATEMENT A: distribution is unlimited. Approved for public release; Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-

7、A-A-54772 9999974 O320960 386 A-A- 5 4 7 7 2 The tubing shall be a one piece construction of “YI shape made of polyvinyl chloride plastic. The vertical portion of the tubing shall be at least 13 inches long. All three ends of the tubing shall make leakproof connection with their attached parts, The

8、tubing shall be smooth, flexible, seamless and not tacky to the touch. kink or exhibit any sign of permanent deformation with repeated use. The tubing shall not The ear tips shall be made of suitable plastic or rubber. The tips shall be a minimum of 1/2 inch long, and be provided with a lumen for th

9、e entire length. The lumen shall have well defined internal threads that will fit securely over the threads of the aural tubes. The diameter of the ear tip shall be 17/32 2 1/32 inch. Chest piece. embodying a bell and diaphragm unit, and shall operate with a two position valve that will allow either

10、 bell or diaphragm as a functional unit. Appropriate marking or other indication shall be present on the chest piece to indicate the function selected. The chest piece shall be a combination type, The combination chest piece shall substantially reduce all sounds for the chest piece not selected so t

11、hat a minimum increase of 25 decibels (db) is required for audible sound to pass through that chest piece, when tested as specified. The chest piece assembly shall consist of a body, retaining ring and diaphragm. The chest piece body shall be fabricated of suitable metal with mirror finish chromium

12、over nickel plating. The diaphragm side shall be suitably threaded to receive the retaining ring. inner circumference of the ring. diaphragm and bell shall be as follows: The diaphragm shall be held in place by the The diameters of the - Bell Diaphraqm Size 1 1-3/32 inches minimum 1-1/2 to 2 inches

13、Size 2 1 inch minimum 1 to 1-1/2 inches 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-54772 - 9999974 0120961 212 = A-A-5 4 7 7 2 Sound transmission. The sound transmission shall be such that the corrected threshold values in decibels (lowest

14、 audiometer volume for audibility) shall be the following maxima when tested as specified: CYCLES PER SECOND Frequency 125 500 1,000 2,000 3,000 Bell O 5 10 -* - Diaphragm - - 10 15 35 * Blank spaces indicate absence of requirement. Tests. (a) Effectiveness of selector valve. This test shall be run

15、at 125 cycles per second (cps) only. The bell side of the chest-piece is shut off. The stethoscope is fitted to the ears of the tester and the binaurals adjusted for optimum hearing. The bell is placed concentrically over the output earphone and an airtight junction established. The diaphragm (on to

16、p side) is masked with a sponge or the palm of the hand. The volume of sound is increased until the threshold value is obtained. There shall be a minimum increase of 25 db required to reach the threshold value with the bell shut compared to the threshold value at 125 cps with the bell open. Since th

17、is determination is based on the difference in readings, no corrections should be applied. the audibility threshold, the greater the effectiveness of the selector valve. The greater the increase in dbs required to reach (b) Sound transmission test. All sound transmission tests on the stethoscopes sh

18、all be conducted in a room with a minimum and constant level of background noise. audiometer complying with ANSI Standard S3.6 shall be the test instrument. An The audiometer is allowed to warm up for 15 minutes and hearing of the tester shall be established as being normal by comparing his audiogra

19、m with audiograms of six other people whose hearing is considered normal. Normal hearing is defined as being no more than 15 db above audiometric zero for a given frequency. testers hearing is screened are at 125, 500, 1,000, 2,000, and 3,000 cps. Audibility thresholds are determined for each freque

20、ncy, that is, the minimum db level at which sound is detectable. These threshold values for the tester are The frequencies at which the 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-54772 m 9999974 OL20962 I159 m A-A-54772 run each time just

21、prior to the evaluation of stethoscopes. Audiogram values for the tester shall be run each half-hour in order to compensate primarily for variations in the background noise level. The maximum audiogram values at each frequency, whether obtained with one ear or the other during the testing, shall be

22、used as corrections. Although both earphones are placed over the ears of the tester, only one earphone shall transmit the sound to the tester. The other earphone is kept soundless. The audiogram values are subtracted from the corresponding frequency values obtained on the stethoscopes to give correc

23、ted readings. Frequency response characteristics. The operative side of the chest piece is placed in the center of the output earphone of the audiometer. A pressure on the chest piece just adequate to maintain a hermetic seal is maintained during the testing. The binaurals of the stethoscopes are ad

24、justed for optimum reception by the tester. When the chest piece, especially the bell of the pediatric size, is smaller than the center hole of the foam rubber pad of the audiometer earphone, it will be necessary to use a soft, one-eighth inch layer of foam rubber or plastic with a hole in it just s

25、lightly smaller than the bell being tested. Such an adapter gasket provides the necessary hermetic coupling of the bell to the audiometer earphone. with a 125 cps frequency setting the volume of sound is varied until the point is reached at which the sound from the audiometer is just detectable. Thi

26、s is the threshold value. The same procedure is repeated for 500, 1,000, 2,000 and 3,000 cps. The audiogram value for each frequency is subtracted from the value for the corresponding frequency obtained on the stethoscope being tested. corrected readings are compared with the requirements stated und

27、er salient characteristics. Starting The resultant Identification markinq. permanently and legibly marked with the manufacturers name or registered trademark. The chest piece shall be Workmanship. The stethoscope shall be free from defects which detract from its appearance or impair its serviceabili

28、ty. Unit. Each (FA). One stethoscope of the size specified, constitutes one unit. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-54772 999997g OL209b3 095 A-A- 5 4 7 7 2 QUALITY ASSURANCE PROVISIONS. Responsibility for inspection. Unless other

29、wise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any facilities suitable for the performance of th

30、e inspection requirements specified herein, unless disapproved by the Government. Government reserves the right to perform any of the inspections set forth in the specification where such inspection are deemed necessary to assure supplies and services conform to prescribed requirements. for the cont

31、ractor shall be maintained by the contractor and made available to the Government upon the Governments request, at any time, or from time to time, during the performance of the contract and for a period of three years after delivery of the supplies to which such records relate. examination (such as

32、visual or auditory investigation without the use of special laboratory appliances or procedures) and testing (determination by technical means of physical and chemical The Records. Records of examinations and tests performed by or Inspection. Inspection, as used herein, is defined as both properties

33、) of the item. Tests. Tests shall be conducted to determine compliance with specification requirements. Where feasible, the same sample shall be used for determination of two or more test characteristics. Samplina for tests. Sampling for tests shall be conducted in accordance with MIL-STD-105 and as

34、 specified herein. Unit of product for test purposes shall be one ctethoscope. level shall be S-1, and acceptance number shall be zero. Metric products. Products manufactured to metric dimensions will be considered on an equal basis with those manufactured using inch-pound units, providing they fall

35、 within the tolerance specified using conversion tables contained in the latest revision of Federal Standard No. 376, and all other requirements of this document are met. Inspection 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-54772 9999974

36、03209bq T2L M A-A-5 4 7 7 2 If a product is manufactured to metric dimensions and those dimensions exceed the tolerances specified in the inch-pound units, a request should be made to the contracting officer to determine if the product is acceptable. The contracting officer has the option of accepti

37、ng or rejecting the product. Contractor certification. maintain substantiating evidence that the product offered meets the salient characteristics of this Commercial Item Description, and that the product conforms to the producers own drawings, specifications, standards, and quality assurance practi

38、ces. The government reserves the right to require proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract. Requlatorv reauirements. The contractor shall certify and Federal Food, Druq and Cosmetic Act. If the product cove

39、red by this document has been determined by the U.S. Food and Drug Administration to be under its jurisdiction, the offeror/contractor shall comply, and be responsible for compliance by its subcontractors/suppliers, with the requirements of the Federal Food, Drug and Cosmetic Act, as amended, and re

40、gulations promulgated thereunder. offeror/contractor shall comply, and be responsible for compliance by its subcontractors/suppliers, with the requirements of all other applicable Federal, State, and local statutes, ordinances, and regulations. In addition, the Recovered materials. The offeror/contr

41、actor is encouraged to use recovered material in accordance with Federal Acquisition Regulation Subpart 23.4 to the maximum extent practical. Preservation, Packaqinq, P ackinq, labelinq, and markinq. otherwise specified, preservation, packaging, and packing shall be to a degree of protection to prec

42、lude damage to containers and/or contents thereof under normal shipping conditions, handling, etc., involving shipment from the supply source to the receiving activity, plus reshipment from receiving activity and shall conform to applicable carriers rules and regulations. Intermediate and exterior p

43、ackage quantities and labeling and marking shall be as specified in the contract and/or order. Orderins data. labeling and marking must be specified in the contract and/or order. Unless Intermediate/exterior package quantities and 6 Provided by IHSNot for ResaleNo reproduction or networking permitte

44、d without license from IHS-,-,-A-A-54772 = 9999974 0120965 968 A-A-5 4 7 7 2 NOTE: and Sizes are covered by this document: The following National Stock Numbers, Item Identifications NATIONAL STOCK NUMBERS SIZES 6515-00-935-4088 6515-00-935-4089 MILITARY INTERESTS: Custodians: Army - MD Navy - MS Air

45、 Force - 03 ITEM IDENTIFICATIONS STETHOSCOPE, Combination Type, Lightweight, Adult 1 STETHOSCOPE, Combination Type, Lightweight, Child 2 CIVIL AGENCY COORDINATING ACTIVITIES: VA-OSS FDA-MPQAS USPHS Preparing Activity: DoD-MB Agent : DU-DM Project Number: 6515-5296 Location: c:wordgandhistethcid 7 Pr

46、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-54772 9999974 01i207bb 8T4 W STANDARDIZATION DOCUMENT IMPROVEMENT PROPOSAL INSTRUCTIONS 1. The preparing activity must complete blocks 1,2,3, and 8 In block 1, both the document number and revision le

47、tter should k given. 2. The submitter of this form must complete blocks 4,5,6, and 7. 3. The preparing activity must provide a reply within 30 days from receipt of the form. NOTE: This form may not be used to request copies of documents, nor to request waivers, or clarification of requirements on cu

48、rrent contracts. Comments submitted on this form do not constitute or imply authorization to waive any portion of the referenced document(s) or to amend contractual requirements. . DOCUMENTTITLE STETHOSCOPE, Combination Type I Liqht Weiqht . NATURE OF CHANGE (#rntity paragraph numter and id& ProperC

49、d rewrite, if porabk. Attrch extra *ea as needed.) I. REASON FOR RECOMMENDAI?ON 1. PREPARING ACTIVITY B. NAME b. TELEPHONE Ilndudc Area Code) (2) AUTOVON (i) Commercial Defense Personnel Support Center _ ATTN: DPSC-MSE I (215)7372870 444-2870 c. ADDRESS (rncrUa Zip Code) IF YOU DO NOT RECEIVE A REPLY WITHIN 45 DAYS, CONTACT: 2800 South 20th Street Philadelphia, PA 19145 Defense Quality and Standardization Office 5203 Leerburg Pike, Suite