according to fig1 - 6 , the current invention is comprised of two different sheaths , an inner sheath 1 and an outer sheath 2 . the inner sheath 1 has a hollow body having an interior surface and an exterior surface . said interior surface defines a chamber for receiving the ultrasound probe . the outer sheath 2 has a hollow body having an interior surface and an exterior surface . said interior surface defines a chamber for receiving the inner sheath 1 . in order to fit most currently and commercially available ultrasound probes , the outer sheath 2 should be about 6 - 8 centimeter wide and about 8 to 12 centimeter long . it has an open mouth 6 and a closed end 5 . the inner sheath 1 is made with almost the same width as the outer sheath 2 but has a length of about 20 - 24 centimeter . the inner sheath 1 comprises portion a and portion b . portions a and b are continuous bodies which together make one hollow piece which has a closed end 3 and an open end 4 . the inner sheath 1 is manufactured out of a medical grade material which is impermeable to liquids and gel , while allowing the ultrasound signals to pass through . it can be made of thin - walled flexible plastic or latex or any similar material with which conventional probe covers are made . it has to be thin and flexible enough to accept the shape of the probe head and maintain a close contact to it . generally , a thickness of between 15 to 50 micrometers works for most applications . the inner sheath 1 has a length to cover the ultrasound probe head and varying degree of the probe body or even its electric cable , based on the shape and size of the probe . the outer sheath 2 can be made of soft and flexible and even semi - flexible , but preferably , it is made of soft plastic material and generally has a thickness of more than the thickness of inner sheath . the outer sheath 2 is impermeable to liquids and ultrasound gels , and will be removed before the ultrasound probe , covered with sterile inner sheath 1 , is placed over a patient &# 39 ; s body . at the manufacturing facility , 10 - 15 ml of coupling gel 8 is placed inside closed end 5 of the outer sheath 2 . portion a of the inner sheath 1 is then inserted inside the outer sheath 2 and advanced all the way down , in such a manner that the inner sheath &# 39 ; s 1 closed end 3 is placed inside the outer sheath &# 39 ; s 2 closed end 5 and comes in contact with gel 8 . next , 3 - 5 ml of coupling gel 7 is applied inside the closed end 3 of the outer sheath 2 . portion b of inner sheath 1 is then folded outwardly over the open end 6 of the outer sheath 2 to cover the external surface of outer sheath 2 partially or completely . as it can be realized by this description , the inner sheath 1 which ultimately will be the only sheath to cover the ultrasound probe during image acquisition will be gelled both over the inner surface and the outer surface of the closed end 3 . it is gelled inside by gel volume 7 and gelled outside by contact and transfer of gel volume 8 . these two layers of gel will serve to provide an airless contact between the probe head and the patient &# 39 ; s body . referring to fig5 and 6 , a clamp 9 is placed over the combined inner and outer sheaths 1 , 2 . the clamp 9 is placed above the closed ends 3 , 5 which contain gels 7 , 8 . the clamp 9 will maintain gels 7 , 8 inside the inner and outer sheaths 1 and 2 and prevent the gels 7 , 8 from moving upward and spilling out . the clamp 9 has to be tight and plays a critical role in maintaining the gels 7 , 8 inside the bottom ends 3 , 5 and maintain sterility and integrity of the gels 7 , 8 . the two layer probe cover is then packaged and sterilized . in an alternate embodiment , the two layer probe is folded at a level just above the gel volumes 7 , 8 . a piece of rubber band or a plastic clamp can be placed tightly over the cover to keep the cover folded and maintain the gels 7 , 8 inside the cover and prevent it from spilling out . the folding of portion b over the outer sheath 2 is critical to cover and protect the open mouth 6 . portion b covers and protects the open mouth 6 of the outer sheath 2 from touching and contamination during handling of the probe cover . if the open end 6 is touched and contaminated , it can render the inner sheath 1 unsterile as the closed end 3 of inner sheath 1 comes in contact with the open end 6 while it is being pulled out of outer sheath 2 . at the patient &# 39 ; s bedside and upon opening of the package , the practitioner holds the double sheath probe cover with one hand and removes the clamp 9 . next , using his / her other hand , he or she inserts the ultrasound probe into the inner sheath 1 and pushes the probe all the way into the inner sheath 1 until the probe head comes in close contact with the closed end 3 and gel 7 . then the folded portion b of the inner sheath 1 is unfolded and pulled up to cover the base of the ultrasound probe . the unfolded portion b can be secured around the base of ultrasound probe or its cable , using a piece of adhesive tape , rubber band or a plastic clip . next , the ultrasound probe , while it is covered by the sterile inner sheath 1 is grabbed at its base and pulled out of the outer sheath 2 and placed over the desired area of a patient &# 39 ; s body . at this time , the gel 7 is creating an airless contact between the probe head and the inner sheath 1 . the gel 8 is partially transferred to the exterior surface of the closed end 3 . this partially transferred gel 8 will create an airless contact between the probe cover and the patient body . as it can be seen in fig3 through 6 , the outer sheath 2 covers and maintains sterility of the inner sheath 1 as it has been held and manipulated by the practitioner , and allows a practitioner to place an ultrasound probe inside a probe cover very quickly and in a sterile manner without using an assistant . moreover there is no need for the extra time - consuming process of adding ultrasound gel to the head of ultrasound probe or to the patient &# 39 ; s skin . in handling of this probe cover , the practitioner has the option of donning sterile gloves or not . even without using sterile gloves , the sterility of the inner sheath 1 is maintained as long as the practitioner holds and touches the ultrasound probe at its base and not the probe head and its sterile cover .
a new and improved sterile ultrasound probe cover , said cover comprising two layers . the inner layer being placed inside the outer layer , the cover is gelled inside both inner and outer layers . the present invention can be manufactured inexpensively , is easy to use , and can cover an ultrasound probe in sterile manner very quickly , in amount of time which is appealing to practitioners and can be used without using an assistant .