Surgery – Instruments – Obstetric or gynecological instruments
Patent
1992-08-10
1996-04-16
Thaler, Michael H.
Surgery
Instruments
Obstetric or gynecological instruments
294 641, A61B 1742
Patent
active
055077528
ABSTRACT:
Flexible, collapsible, dome or cylinder-shaped bonnet that provides a substantially airtight fit to a fetal head and utilizes frictional and internally-created vacuum forces for assisting childbirth. The bonnet is manually inserted and rolled over the cranium of the fetus, stopping short of the eyes and the ears. Friction and internally created vacuum forces are created when the bonnet is pulled, thus securing the bonnet to the fetus's head and allowing orientation and delivery. The device is comprised of a dome or cylinder-shaped body made of a collapsible elastic material, an optional raised "lip" located on the exterior of the open end, and may have a mechanical extension attached to the closed end. System embodiments allow for the attachment to the exterior of the closed end grommets and/or mechanical extensions that will irreversibly stretch, lengthen, and expose warning alerts in the event that excessive longitudinal force is applied. The bonnet is a significant improvement because it allows a firmer grip on the fetus' head with less danger of damage to either the mother or the fetus. Thus traction and rotational forces may be safely applied to a fetus without the need to use forceps or hard suction cups.
REFERENCES:
patent: 1024286 (1912-04-01), Santilli
patent: 1782814 (1930-11-01), Froelich
patent: 1814544 (1931-07-01), Cairncross et al.
patent: 2049723 (1936-08-01), Pomeranz
patent: 2126689 (1938-08-01), Pouliot
patent: 2227673 (1941-01-01), Price
patent: 2634998 (1953-04-01), Flower
patent: 2637587 (1953-05-01), Robinson
patent: 2730720 (1956-01-01), Saunders
patent: 2824481 (1958-02-01), Johnson
patent: 2983541 (1961-05-01), Maki
patent: 3051960 (1962-09-01), Rendulich
patent: 3510880 (1970-05-01), Gerson
patent: 3765408 (1973-10-01), Kawai
patent: 3909055 (1975-09-01), Koppel
patent: 4597391 (1986-07-01), Janko
"The CMI Vacuum Delivery System", -Columbia Medical & Surgical, Inc., Comtemporary OB/Gyn, Apr. 1990, vol. 35, p. 65.
"Application for Investigation Device Exemption for the Obstetric Bonnet"-Byron D. Elliott, M.D. (1990).
"Soft Cup Vacuum Extraction: A Comparison of Outlet Delivery"-Dell et al., Obstetrics & Gynecology (1985), pp. 624-628.
"Obstetric Forceps"-ACOG Committee Opinion, No. 59, Feb., 1988.
"Complications of Operations and Procedures for Labor and Delivery"-Newton et al., W.B. Saunders Co., 1988, pp. 350-357.
"Emergencies in Labor"-Handbook of Obstetric Emergencies-Schwartz, R. H. (1984) Medical Examination Publishing co., pp. 83-85.
"A Role Exists for Vaginal Instrumental Delivery"-O'Grady, J. P., Contemporary OB/Gyn, Apr., 1990, vol. 35, pp. 49-56.
"Instrumental Delivery in the 1990s: A Commentary"-Acker, D., Contemporary OB/Gyn, Apr., 1990, vol. 35, pp. 58-61.
"Cohort Study of Silastic Obstetric Vacuum Cup Deliveries: I. Safety of the Instrument":-Berkus et al., Obstetrics & Gynecology, vol. 66, No. 4, Oct. 1985, pp. 503-509.
"Portsmouth Operative Delivery Trial: A Comparison of Vacuum Extraction and Forceps Delivery"-Vacca et al., British Journal of Obstetrics and Gynecology, Dec. 1983, vol. 90, pp. 1107-1112.
"An Assessment of the Compression and Traction Forces of Obstetrical Forceps"-Kelly et al., American Journal of Obstetrics and Gynecology, Oct. 15, 1966, pp. 521-537.
"Original Mityvac Obstetrical Vacuum Delivery System"-Advertising and Informational Brochure, OB Specialties, Inc., 1988.
"Traction in Forceps Deliveries"-Burdett Wylie, Am. J. of Obset. and Gyn., vol. 29, pp. 425-433 (1985).
"Compression of the Fetal Brain"-John V. Kelly, Am. J. of Obstet. and Gyn., vol. 85, No. 3, pp. 687-694 (1963).
"Local Analgesia and Kielland's Forceps"-J. S. Scott and R. L. Gadd, British Medical Journal, vol. 1, pp. 971-975 (Apr. 27, 1957).
"Recording of Tractive Power in Vacuum Extractions"-J. Perinat. Med. 1 (1973), pp. 291-292.
"A Comparison of Different Methods of Instrumental Delivery Based on Electronic Measurements of Compression and Traction":-Moolgaoker et al., Obstetrics & Gynecology, vol. 54, No. 3, Sep., 1979, pp. 299-309.
"Electronic Recording of Forceps Delivery"-Warren H. Pearse, Am. J. of Obstet. and Gyn., May 1, 1963, vol. 86, No. 1, pp. 43-51.
"Vacuum Extraction:"-Ted D. Epperly and E. R. Breitinger, AFP, vol. 38, No. 3, Nov. 19, 1988, pp. 205-210.
"Soft-Cup Vacuum Extractors Safely Assist Normal Deliveries"-Frank R. Witter, Contemporary OB/GYN Special Issues-Technology 1986, Oct., 1985, pp. 109-118.
"Advances in Obstetrics: The Vacuum Extractor-Introduction to the Mityvac Vacuum Delivery System"-Dr. John Wood.
Board of Regents , The University of Texas System
Thaler Michael H.
LandOfFree
Obstetric bonnet for assisting childbirth and method of manufact does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Obstetric bonnet for assisting childbirth and method of manufact, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Obstetric bonnet for assisting childbirth and method of manufact will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-321731