US3550595A - Obstetrical forceps - Google Patents

Obstetrical forceps Download PDF

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Publication number
US3550595A
US3550595A US722645A US3550595DA US3550595A US 3550595 A US3550595 A US 3550595A US 722645 A US722645 A US 722645A US 3550595D A US3550595D A US 3550595DA US 3550595 A US3550595 A US 3550595A
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US
United States
Prior art keywords
forceps
outlet
obstetrical
axis
perineal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US722645A
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English (en)
Inventor
Leonard E Laufe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WESTERN PENNSYLVANIA HOSPITAL
WESTERN PENNSYLVANIA HOSPITAL FOUNDATION FOR MEDICAL EDUCATION AND
Original Assignee
WESTERN PENNSYLVANIA HOSPITAL
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Publication date
Application filed by WESTERN PENNSYLVANIA HOSPITAL filed Critical WESTERN PENNSYLVANIA HOSPITAL
Application granted granted Critical
Publication of US3550595A publication Critical patent/US3550595A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/42—Gynaecological or obstetrical instruments or methods
    • A61B17/44—Obstetrical forceps

Definitions

  • SHEET 2 BF 2 iNVENTOR Leonard E. Loufe OBSTETRICAL FORCEPS This invention relates to obstetrical forceps and particularly to improved outlet forceps.
  • My present invention provides an outlet forceps which eliminates the application of. harsh forces to a fetal head while at the same time avoids undue irritation to the maternal vaginal soft parts, and additionally is simple to use since it does not require an axis traction handle or any special operating technique.
  • My outlet forceps provide these advantages by combining preferably, a pair of elongated members pivotably connected to each other at one end thereof; each of the members having finger grip portions extending laterally from the pivot, a shank portion extending from the finger grip portion to an intermediate point, with the shank including a longitudinally extending recess along the inner surface thereof and adjacent the finger grip portion, a blade portion extending forwardly from the shank portion and having a contoured fetal head engaging shape; each of the shank portions having a longitudinal shape such that they longitudinally abut each other along their respective inner surface forwardly from their respective recesses when the members are pivotably closed with respect to each other; and each of the shank portions have perineal curves such that the axis of traction of a maternal pelvis lies substantially on the plane including the finger grip portions when the forceps are being used.
  • FIG. 1 is a top plan view of the outlet forceps of this invention in a closed disposition
  • FIG. 2 is a top plan view similar to that of FIG. 1 showing the forceps in an open disposition
  • FIG. 3 is a side elevation view of the outlet forceps of this invention showing the perineal curve of the shank portion thereof;
  • FIG. 4 is a perspective view of the pivot arrangement of the outlet forceps of the invention.
  • FIG. 5 is a sectional view through a maternal pelvis and a perspective view of a hand of an operator using the outlet forceps of the present invention to assist fetal delivery;
  • FIG. 6 is a view taken along the line VI-VI of FIG. 5.
  • the forceps 10 include a pair of elongated members 12 and 14 pivotably connected to each other at one end thereof for movement with respect to each other as shown in FIGS. 1 and 2.
  • Each of the members I2 and 14 has a blade I6 at the forward portion thereof, which blade 16 has a contoured fetal head-engaging shape.
  • Each of the blades 16 is also provided with a contoured indentation 18. as shown in FIG. 3. on the inner surface thereof. Blades 16 extend rearwardly to smooth curving shank portions 20. The particular curvature of the shank portions 20 is what is known as the obstetrical forceps art as a perineal curve.
  • Shank portions 20 are also provided at the rear end sections thereof with laterally outwardly extending portions 22 which together define an enlargement 24 between the inner surfaces of shank portions 20. Enlargement 24 is sufficiently sized to receive a large sized middle finger, in the manner shown in FIG. 6.
  • Pivot lock 30 includes bifurcated ears 32 extending laterally inwardly of member 12 with a pin 34 extending between the cars at a generally central portion thereof.
  • a tab 36 extends laterally inwardly from member 16 and is provided with a slot 37 sized to snugly fit in the space between ears 32.
  • the surface of member 14 in the vicinity of tab 36 is suitably shaped to receive the free ends of ears 32 such that a continuous surface is formed at the rear end of the forceps as shown in FIGS. 1 and 2.
  • the rear ends of the shank portions 20 are provided with laterally outwardly extending finger grips 40 suitably sized and shaped to accommodate the index finger and the third finger of an operator in the manner illustrated in FIGS. 5 and 6.
  • FIGS. 5 and 6 The operation of the forceps I0 is partially illustrated in FIGS. 5 and 6.
  • FIG. 5 as noted earlier, also illustrated the inherent axis traction principle of the forceps due to the shank portion 20 being provided with perineal curves.
  • the fetal head With the operator holding the forceps 10 in the manner shown the fetal head will not be given a positive force. Rather, the operator actually urges the forceps in an open direction since he exerts opening force on the finger grips 40 as he pulls along the axis of traction.
  • the forceps act as an interface between the fetal head and the pelvic walls, and the compressive force on the head is derived from the maternal pelvis.
  • the enlargement 24 between the shank portions 20, as well as providing a convenient accommodation for the operators middle finger, serves as a safety feature in that the operator's middle finger will prevent inadvertent squeezing of the forceps by the operator.
  • Enlargement 24 of the size described is not absolutely necessary but is very desirable.
  • forceps 10 of this invention are smaller and more compact than the commonly used crossedtype forceps.
  • Obstetrical outlet forceps comprising: a pair of elongated members pivotably connected to each other adjacent one end portion thereof and freely movable relative to each other when pivotably connected; each of said members having:
  • a finger grip portion extending laterally thereof from said one end portion
  • a shank portion extending from said finger grip portion to an intermediate point of said member, and shank portion including a longitudinally extending recess along the inner surface thereof and adjacent said finger grip portion;
  • each of said shank portions having a perineal curve along a major portion thereof such that the axis of traction of a maternal pelvis lies substantially on the plane including said finger grip portions when the forceps are being used.

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Gynecology & Obstetrics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Reproductive Health (AREA)
  • Engineering & Computer Science (AREA)
  • Pregnancy & Childbirth (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)
US722645A 1968-04-19 1968-04-19 Obstetrical forceps Expired - Lifetime US3550595A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72264568A 1968-04-19 1968-04-19

Publications (1)

Publication Number Publication Date
US3550595A true US3550595A (en) 1970-12-29

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US722645A Expired - Lifetime US3550595A (en) 1968-04-19 1968-04-19 Obstetrical forceps

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US (1) US3550595A (de)
DE (1) DE1901351C3 (de)
GB (1) GB1235775A (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4151846A (en) * 1975-11-14 1979-05-01 Dieter von Zeppelin Forceps
FR2406431A1 (fr) * 1977-10-20 1979-05-18 Teissier Georges Dispositif fonctionnel de forceps paralleles
US4248233A (en) * 1974-11-19 1981-02-03 Zeppelin Dieter Von Forceps
US4823792A (en) * 1987-05-11 1989-04-25 Andrew Tool Company Gripping device and locking mechanism for use therewith
US5065516A (en) * 1987-05-11 1991-11-19 Andrew Tool Company Disassemblable scissors means
US5217467A (en) * 1990-05-14 1993-06-08 Medisys Technologies, Inc. Device for assisting childbirth
US5318573A (en) * 1990-05-14 1994-06-07 Medisys Technologies, Inc. Device for assisting childbirth
US5573539A (en) * 1994-06-06 1996-11-12 Medisys Technologies, Inc. Device for assisting in the birth of livestock
US5593413A (en) * 1990-05-14 1997-01-14 Medisys Technologies, Inc. Device for assisting childbirth
US5674243A (en) * 1995-08-03 1997-10-07 Hale; Theodore Mark Obstetrical forceps
US5849024A (en) * 1995-07-11 1998-12-15 Schellpfeffer; Michael A. Laparoscopic tissue retrieval forceps
US5910146A (en) * 1990-05-14 1999-06-08 Medisys Technologies, Inc. Device for assisting childbirth
US6398790B1 (en) 2001-05-04 2002-06-04 Medisys Technologies, Inc. Delivery assistance device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111728682B (zh) * 2020-07-06 2022-08-02 日照市妇女儿童医院(日照市妇幼保健院、日照市妇幼保健计划生育服务中心) 一种自解锁妇产科产钳

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248233A (en) * 1974-11-19 1981-02-03 Zeppelin Dieter Von Forceps
US4151846A (en) * 1975-11-14 1979-05-01 Dieter von Zeppelin Forceps
FR2406431A1 (fr) * 1977-10-20 1979-05-18 Teissier Georges Dispositif fonctionnel de forceps paralleles
US4823792A (en) * 1987-05-11 1989-04-25 Andrew Tool Company Gripping device and locking mechanism for use therewith
US5065516A (en) * 1987-05-11 1991-11-19 Andrew Tool Company Disassemblable scissors means
US5318573A (en) * 1990-05-14 1994-06-07 Medisys Technologies, Inc. Device for assisting childbirth
US5217467A (en) * 1990-05-14 1993-06-08 Medisys Technologies, Inc. Device for assisting childbirth
US5593413A (en) * 1990-05-14 1997-01-14 Medisys Technologies, Inc. Device for assisting childbirth
US5910146A (en) * 1990-05-14 1999-06-08 Medisys Technologies, Inc. Device for assisting childbirth
US5573539A (en) * 1994-06-06 1996-11-12 Medisys Technologies, Inc. Device for assisting in the birth of livestock
US5849024A (en) * 1995-07-11 1998-12-15 Schellpfeffer; Michael A. Laparoscopic tissue retrieval forceps
US5674243A (en) * 1995-08-03 1997-10-07 Hale; Theodore Mark Obstetrical forceps
US6398790B1 (en) 2001-05-04 2002-06-04 Medisys Technologies, Inc. Delivery assistance device

Also Published As

Publication number Publication date
DE1901351B2 (de) 1977-12-29
DE1901351C3 (de) 1978-08-24
GB1235775A (en) 1971-06-16
DE1901351A1 (de) 1969-10-30

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