Method and apparatus for handling and dosing of an additive whil

Agitating – Having specified feed means – By suction

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Details

366342, 366108, 366348, B01F 1300

Patent

active

057695377

DESCRIPTION:

BRIEF SUMMARY
GENERAL DESCRIPTION

The present invention generally relates to a method and an apparatus for collecting and/or transporting liquids of various types, without any admixture of air or gas thereinto, and for storing said liquid in a closed, air or gas free container or receptacle, or for direct introducing the liquid into another liquid system, and handling said liquid without any contact with a human hand, and without the risque of contaminating said liquid during the handling thereof, and preferably under sterile conditions.
The invention is useful for handling of many various kinds of liquids and for many various purposes, in particular for handling of liquids which may de ruined, oxidized, gelified etc. depending on the influence of air or another gas, for handling of liquids which tend to form foam or froth during the handling thereof, liquids containing non-desired or harmful particles or impurities, mixed liquids which tend to separate or to form layers etc. during or after the collection thereof.
The method and the apparatus can be used for instance for handling of food stuffs like milk, cream, oils, syrups, juices etc., for handling of liquids of various kinds which are corrosive or harmful to the environement, and during the handling of which it is important that the liquid does not get in contact with a human skin or is let out in the nature or is drained. The invention may for instance be used for handling of oils or mixed liquids which do no solve in each other, in handling of blood in connection to medical operations, for sucking up waste liquids of various types, etc.
The invention has been developped especially in connection to handling of blood, and in the following the invention will mainly be described in connection to such handling. This is, however, no restriction of the invention to said particular field of use.
There is always a short supply of blood and large amounts of blood are needed and used for blood transfusions, for instance in connection to surgical operations. Blood is a very expensive product both as concerns the costs for collecting same, and also as concerns the costs for testing and storing same. During blood transfutions there is also a risque of transfer of jaundice, HIV infection and other diseases.
During many surgical operations the patient looses large amounts of blood, sometimes up to several liters. Normally such blood gets wasted and it is necessary that the patient gets a corresponding amount of blood by means of transfusions from blood donors.
Attempts have been made to solve the problem of the lack of blood in various ways. For instance, there are methods for purifying blood which has partly coagulated in connection to sucking up blood from the operation wound, but such methods are expensive and time consuming and also result in an inferior product. In some cases also so called "auto-transfusions" have been practiced, and this is made in that the patient is tapped on his own blood some weeks in advance of a planned surgical operation, whereupon said patient, upon need, receives his own blood during or after the operation. The method, however, requires a planning of the surgical operation and can not be utilized in case of emergency operations. Generally it is also necessary that the patient is, at least, at a relatively good health when the blood is tapped in advance of the operation, and it is necessary that an equipment for eventual purification, cataloguing and storing of the patient's blood is available. Therefore the method has been used very rarely.
The object of the invention, according to the last mentioned aspect, that is the handling of blood, therefore has been the idea of collecting as much as possible of the patient's own blood, which blood gets lost during a medical operation and to return such blood the the patient himself.
In this connection three different main problems appear: large amounts of air are also sucked into the system, and this leads to a heavy foam or froth formation, and this, in combination with the contact of the blood with for

REFERENCES:
patent: 2701708 (1955-02-01), Keen
patent: 3063683 (1962-11-01), Westbrook

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