ophthalmic gases – sf6, c2f6 and c3f8

sf6, c2f6 and c3f8 are offered for single use application. The gases are easy to handle and to apply. sf6, c2f6 and c3f8 support post surgical tamponading of the retina.

 

High purity

Improved convenience

Adjustable gas concentration

Environmental friendly

Enhanced safety

 

 

THE ISSUE

CO2 emissions

CO2 emission issue
The specific global warming potential of SF6 is approximately 22.000 higher when compared to CO2

Due to their impact on our environment, fluorinated gases have been banned from a wide range of industrial applications. However, some gases are still available for medical purposes.

As the demand for gas is constantly increasing, the challenge is to support and preserve our environment. The aim must be to release as little gas as possible during the surgical procedure.

Premixed gases, as well storage containers currently used (bottles, cans) can raise legal and/or stability concerns.

 

OUR ANSWER

effective dose

borosilicate glass container

In borosilicate glass containers, the gas is stored in a non-pressurized state. The glass container is gas tight and does not allow any exchange with the external environment. The gentle sterilization process allows for safe storage of the gas.

The system helps protect the environment by offering only the quantities which are needed in the OR, thus minimizing waste.

The surgeons can adjust the gas concentration mixture to their needs without releasing too much gas into the environment

usability

ophthafutur gas handling
Quick guide to assist surgical pratice

SF6, C2F6 and C3F8 are chemically and physiologically inert, colourless, and odourless gases for tamponading retinal detachments after vitrectomy.

application system

 ophthafutur® gases are supplied in glass containers. The system also includes a preassembled sterile plastic syringe to prepare the gas mixture and a small gauge needle to facilitate the injection. A patient information card and a patient bracelet are also included.

preparation of gas mixtures

The illustration shows the single steps of the preparation of gas /air mixtures including handling instructions. 

The gases are offered in a non-pressurized glass container. The pure gas is drawn into the larger sterile plastic syringe (see step 1–4 of the illustration). After the transfer, the surgeon can mix the gas with filtered ambient air.

Prior to mixing the excess of the pure gas which is not needed to prepare the mixture is expelled from the ­syringe. Ambient air is then drawn in through the filter into the plastic syringe. The amount of air determines the resulting mix ratio (step 5 –8 of the illustration).

application

Ensure the vitreous body has been completely removed before applying SF6, C2F6 or C3F8.

It should be considered that pure gases will expand, when purely injected into the eye. There is an equilibrium between gas and am­bient air at which the gas mixture will not expand. Values from the ­literature are given to indicate ­possible non-expansive mixtures. Please be aware to carefully check the mixing process.

A small gauge needle is included to aid the injection of gas. This allows the surgeon to finally adjust the gas pressure within the eye after removing all surgical accessories. Patients who have received gas should be provided with the patient information card and a bracelet should be attached to their wrist.

Patients should be made aware of the possible hazards when a gas bubble is present in the eye.   

warnings

Patients with a gas tamponade must not be exposed to pressure variations (flying, diving, etc.). ­Nitrous oxide anaesthesia must
be interrupted at least 20 minutes before applying SF6, C2F6 or C3F8.

composition

cf6 consists of octafluoropropane with a purity of > 4.5
(Mass fraction > 99.995 %) with a density of 6.176 kg/m3

c2f6 consists of hexafluoroethane with a purity of > 5.0
(Mass fraction > 99.999 %) with a density of 5.829 kg/m3

c3f8 consists of octafluoropropane with a purity of > 4.0
(Mass fraction > 99.99 %) with a density of 7.990 kg/m3

properties

Filling quantity glass reservoir    15 ml
Total syringe volume    60 ml

possible effective tamponade duration of the gases [days]:

sf6: 6
c2f6: 15
c3f8: 30

possible retention time ot the gases [days]:

sf6: 15
c2f6: 30
c3f8: 60

 

For additional information please consult directions for use.