US1587530A - Trepanning instrument - Google Patents
Trepanning instrument Download PDFInfo
- Publication number
- US1587530A US1587530A US741409A US74140924A US1587530A US 1587530 A US1587530 A US 1587530A US 741409 A US741409 A US 741409A US 74140924 A US74140924 A US 74140924A US 1587530 A US1587530 A US 1587530A
- Authority
- US
- United States
- Prior art keywords
- shaft
- cutter
- skull
- ring
- trepanning
- 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
Links
- 210000003625 skull Anatomy 0.000 description 18
- 238000010276 construction Methods 0.000 description 2
- 210000001951 dura mater Anatomy 0.000 description 2
- 230000036346 tooth eruption Effects 0.000 description 2
- YSGQGNQWBLYHPE-CFUSNLFHSA-N (7r,8r,9s,10r,13s,14s,17s)-17-hydroxy-7,13-dimethyl-2,6,7,8,9,10,11,12,14,15,16,17-dodecahydro-1h-cyclopenta[a]phenanthren-3-one Chemical compound C1C[C@]2(C)[C@@H](O)CC[C@H]2[C@@H]2[C@H](C)CC3=CC(=O)CC[C@@H]3[C@H]21 YSGQGNQWBLYHPE-CFUSNLFHSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
- A61B17/1695—Trepans or craniotomes, i.e. specially adapted for drilling thin bones such as the skull
Definitions
- This invention relates to trepanning instruments.
- One object of the invention is to provide a device which will allow the cutting out of a plug from the osseous covering of the skull and will automatically be prevented from penetrating the layer beneath the same.
- a further object of the invention is to provide a cutter having teeth the cutting action of which. is arrested by a covering spring member which is automatically forced out of position when the cover oncounters a sutliciently high resistance.
- Fig. 1 is a longitudinal section of one form.
- Fig. 2 is a longitudinal sect-ion of a second form.
- Fig. 3 is a plan view of Fig. 2 seen from underneath.
- Fig. 4 is a view corresponding to Fig. 2 with the securing ring for the cutter reversed.
- Fig. 5 is a detail.
- the device comprises a shaft 1 having means at one end to hold the shaft in position in an aperture formed in the skull.
- the shaft is threaded as at and this end is adapted to be screwed into a hole formed in the osseous covering; of the skull the hole being formed previously, for example by an ordinary surgical. drill.
- the length of whiclil is regulated so that it cannot pass into the brain box.
- the shaft 1 is provided with key means adapted to be fitted on the squared end 4- in order to screw the threaded end 2 into the skull 3.
- the shaft 1 is provided externally with a thread of close pitch on which is mounted a ring member 6 to which is secured a tubular cutting blade 6*.
- the cutter is operated by means of two handles 7 mounted detachably within the ring member 6.
- the ring 6 is formed at its upper end with a flange or shoulder adapted to receive one end of a compression spring 9 the other end of which is adapted, when the tool is in position, to bear on the osseous skull wall 3.
- the shaft 10 is threaded externally as at 16 to receive a ring 17 the ring being provided with operating handles 18.
- At opposite ends of the ring; 17 are threaded portions 21 and 22 formed on flanges of dift'en ent diameter. Thesethreaded flanges are adapted to receive tubular cutters of different diameter, one or other of which may be used according to the size of the plug it is desired to cut out.
- the ring 17 may be arranged as in Fig. 2 with the flange of larger diameter downwards or in the position of 4 with the flange of smaller diameter extending downwardly.
- the ring Inorder to allow the insertion of the handles 18 the ring is provided with two sets of apertures for the same as shown at 19 and 20.
- a spring 25 2) or 25 (Fig. l) is arranged externally of the ring; 17 and is adapted to bear against a flange provided for that purpose.
- the cutters 6. 23 and 241 above described. are each formed of a tubular member having teeth 26 (Fig. 5) at their edge adapted to contact with the skull wall and to out the same.
- the peripheral wall is further slotted to form spring; members 27 the ends 28 of which, in their normal position. lie level with the teeth 26 and prevent the cutting action thereof.
- edge of the cutter bears against the wall of the skull pressure is exerted on the spring strips 27 which yield slightly and uncover the teeth 26 which carry on the cutting op eration.
- the threaded end 1 of the shaft 2 is placed, operation being effected by a key fitted on the squared end of the shaft 1.
- the cutter is thus fixed to the skull and a plug cut out therefrom by rotating the tubular cutter 6, 6, by means of the handles 7, the spring 9 being interposed between the flange on the ring 6 and the skull wall.
- the cutter shown in Figs. 2' or 4 is used, the knurled end 11 of the shaft 10 being inserted in position within the aperture formed in the skull and the shaft 13 rotated to expand the lower knurled end of the shaft 10 to cause the same to grip theperipheral walls of the aperture.
- the cutter is then rotated by means of the handles 18- and when the plug has been cut out the cutter is forced upwardly away from the dura mater. by means of the spring 25.
- a trepanning instrument comprising a shaft, a tubular cutter mounted for rotation and axial movement on said shaft, means to secure said shaft within an aperture formed in a skull, and spring means arranged externally of and bearing against said cutter and adapted to project beyond the cutting edge of said cutter and to act in an axial clirection.
- a trepanning instrument comprising a shaft having a threaded outer surface, a tubular cutter in threaded connection with said shaft, means to secure said shaft within an aperture formed in a skull and spring means arranged externally of and bearing against said cutter and acting in an axial direction.
- a trepanning instrument comprising a shaft having a threaded outer surface, a ring in threaded connection with said shaft, a tubular cutter secured to said ring, means to secure said shaft within an aperture formed in a skull and spring means arranged externally of said cutter to control the axial movement of said shaft.
- a trepanninginstrument comprising a shaft having a threaded outer surface, a ring in threaded connection with said shaft, a tubular cutter mounted on said ring, means on said ring to allow the mounting of a plurality of cutters of different diameter and spring means arranged externally of said cutter and adapted to bear on the wall of a skull to withdraw a plug automatically as soon as the said plug is cut out.
- a trepanning instrument comprising a hollow shaft internally threaded at one end and having its outer opposite end knurled and the walls of said knurled end radially divided, expanding means lying within and in threaded engagement with said hollow shaft and adapted to be moved axially thereof, a ring adapted to carry tubular cutters of different sizes mounted on said shaft and spring means arranged externally of said cutter to control the axial movement of said shaft.
- a tubular cutter mounted on and movable axially of said shaft, cutting teeth having faces extending parallel with the axis of said tubular cutter and protecting means for said cutting teeth adapted to move axially of said cutter to expose said teeth for cutting when said cutter encounters a sufli ci'ently' high resistance.
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Neurosurgery (AREA)
- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Surgical Instruments (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH223222X | 1923-10-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1587530A true US1587530A (en) | 1926-06-08 |
Family
ID=4452922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US741409A Expired - Lifetime US1587530A (en) | 1923-10-12 | 1924-10-03 | Trepanning instrument |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1587530A (fr) |
| CH (1) | CH107091A (fr) |
| FR (1) | FR585491A (fr) |
| GB (1) | GB223222A (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GR1000209B (el) * | 1989-10-26 | 1992-04-17 | Marios Kaoutzanis | Αποκολλητηρας σκληρας μηνιγγας εγκεφαλου. |
| US5876405A (en) * | 1997-09-17 | 1999-03-02 | The Anspach Effort, Inc. | Perforator |
-
1923
- 1923-10-12 CH CH107091D patent/CH107091A/fr unknown
-
1924
- 1924-09-08 FR FR585491D patent/FR585491A/fr not_active Expired
- 1924-10-03 US US741409A patent/US1587530A/en not_active Expired - Lifetime
- 1924-10-04 GB GB23437/24A patent/GB223222A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB223222A (en) | 1925-03-12 |
| FR585491A (fr) | 1925-03-02 |
| CH107091A (fr) | 1924-10-01 |
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