Local Anaesthesia.
Year: 1896

page_text: g Local Anaesthesia.
I, ROBERT TELSCHOW of Charlottenstrasse 63 Berlin in the Empire of Germany,
Doctor of Medicine do hereby declare the nature of this invention to be as
follows:-
The novelty of this invention is, that ethyle chloride is mixed with air and
conducted by means of a pumping device placed on a tube, whereby such mixture
is brought upon the part of the body to be treated, an intense anaesthesia being
effected. Also the dropping or spilling of the ethyle chloride so inconvenient in
the hitherto used devices is prevented in consequence of the strong air admission,
the liquid vaporises quickly and forms ice, whereby the anaesthesia liquid remains
localised.
It is evident that instead of ethyle chloride other suitable substances can be
used.
The apparatus consists of an air blowing or pumping device which is put upon
a tube. This tube enters into a mixing tube. On the front end of this mixing
tube is an opening, through which the mixture of ethyle chloride and air is
compressed. On the back end of the mixing tube is connected the vessel or a
glass tube containing the anaesthesia liquid. For tightening the joints rubber
sockets may be used.
The apparatus is operated in the following manner: The operator takes the
vessel containing the liquid in the one hand and the pump or blowing device
such as a rubber ball in the other. The ethyle chloride flows towards the opening
and arrives by means of the pressure given by the air blowing ball into the mixing
tube and thence upon the part of the body to be treated.
Dated this 16th day of November. 1896..
HERBERT HADDAN & Co.,
Agents to Applicant.
I, ROBERT TELSCHOW of Charlottenstrasse 63 Berlin in the Empire of Germany,
Doctor of Medicine do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement:-
The purpose of this invention is to accelerate for local ethyle-chloride-
anaesthesia the vaporising of the othyle-chloride by introducing air which causes

page_text: Or
an immediate congelation so that the dropping spilling of the unused ether so
inconvenient in the hitherto used apparatus is avoided. This is attained in the
most perfect manner by the hereinafter described apparatus.
The apparatus shown in the annexed drawing consists of an air blowing or
pumping device a a', which is attached to the air conducting tube b. The tube b
joins the tube m. In the tube m there is arranged a small tube m¹ through which
the ethyle-chloride escapes. On the back end of the tube m there is fixed the
vessel or glass tube y containing the liquid, and this fixing is effected in either
of two ways, as can be seen from Figs. 1 and 2. In Fig. 1 the tube m is screwed
on a nipple on the end of the glass tube or receiver by means of screw threads.
In Fig. 2 the tube m is simply slid over the neck of the glass tube or of a nipple
thereon. In the one method of fixing the rubber discs e (Fig. 1) and in the other
the rubber socket el (Fig. 2) which surrounds and presses on the cutside of tube m
serve for effecting a tight closure between the vessel g and the tube m. The
tube m is provided with a closure valve h which serves for closing the apparatus
alter use, in order to avoid the useless escape of ether.
This apparatus is used in the following manner:-
After the closure valve h has been opened the glass vessel g is taken in one
hand and the rubber ball a in the other hand. The ethyle-chloride then rises
through the small tube m¹ to the mouth of the apparatus and is here met by the
air introduced through the tubes b_and_m, by means of the air pumping or blowing
device-a,-the-mixture of ethyle-chloride-with-air-is-directed on the place where.
local anaesthesia is required. In consequence of the immediate congelation of the
mixture, any collecting or dropping of ether is absolutely avoided and anaesthesia
is effected at once. It is impossible for the tubes to freeze as the air is brought
in contact with the ether only at the mouth of the apparatus. During the opera-
tion to be performed the valve is closed and prevents the ether from escaping.
The apparatus can be used for local anaesthesia in all surgical operations. It is
especially convenient for dental purposes as the collecting of the unused ether
in the mouth is impossible in consequence of the immediate congelation. By
lengthening the tube a¹ the air pumping or blowing device can be arranged to be
operated by the foot so that the operator has one hand free for the operation.
.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is :-
1. An apparatus for use in local ethyle-chloride-anaesthesia in which the ethyle-
chloride or another appropriate ether escaping through the small tube m¹ mixed
at the mouth of the apparatus with the air introduced by a blowing device a a¹
through the tube b and m and is directed on the place to be treated for the purpose
of instantaneous anaesthesia.
2. In the apparatus as described in Claim 1 the construction comprising the
ring c and the socket c¹.
3. In the apparatus as described in Claim 1 the construction comprising the
closure valve h on the tube m for the purpose of preventing the ether from
escaping.
Dated th 19th
A 1907
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, Agents to Applicant.