referring more specifically to the drawings , for illustrative purposes the present invention is embodied in the apparatus generally shown in the drawings identified as fig1 through fig4 where like references denote like parts . it will be appreciated that the apparatus may vary as to configuration and as to details of the parts without departing from the basic concepts as disclosed herein . referring to fig1 and fig2 together , the apparatus 10 of the present invention supports a transducer 12 or other similar instrument in position where compression is to be applied to patient 14 . transducer 12 is supported in position by a clamp 16 , one embodiment of which is shown in detail in fig3 . clamp 16 includes a receptacle 18 for holding and receiving transducer 12 . referring now to fig2 transducer clamp 16 is joined to first arm member 20 with a spacer 34 in between . first arm member 20 , which is a transducer holder arm , fits within second arm member 22 and is slidably coupled thereto . second arm member 22 is pivotally coupled to third arm member 24 . third arm member 24 , which is an elongated coupling arm , fits within fourth arm member 26 and is slidably coupled thereto . fourth arm member 26 fits within fifth arm member 28 and is slidably coupled thereto . fifth arm member 28 fits within stand member 30 and is slidably coupled thereto . stand member 30 is rigidly joined to base 32 which supports the entire apparatus . in this manner , once the apparatus is placed adjacent to the patient , transducer clamp 16 can be adjusted both as to vertical , horizontal , and radial position . as can be seen , the combination of first arm member 20 and second arm member 22 effectively forms a first support means which is rotatably moveable in relation to a second support means formed by the combination of third arm member 24 , fourth arm member 26 , fifth arm member 28 and stand member 30 . since second arm member 22 and third arm member 24 are pivotally coupled , transducer clamp 18 can be rotated or otherwise adjusted into a sphere of positions . this is an important feature of the apparatus in that it is not always possible to position patient 14 such that the area to which pressure is to be applied by transducer 12 is vertically oriented . in the preferred embodiment , stand member 30 is typically an elongated hollow tubular member which is rigidly joined to base 32 by welding or other common fastening techniques . fifth arm member 28 is typically of an &# 34 ; l - shaped &# 34 ; cantilever configuration having a first leg member 36 which slides within stand member 30 , and a substantially perpendicular hollow second leg member 38 for receiving fourth arm member 26 . stand member 30 includes a slot 40 in which pin 42 slides . pin 42 is joined to first leg member 36 . this configuration limits the distance of travel of fifth arm member 28 and prevents it from being inadvertently separated from stand member 30 during adjustment . knob 44 is provided on stand member 20 to tighten a cinch pin or screw bolt against first leg member 36 to lock in position and prevent further movement of fifth arm member 28 once it is adjusted in position . fourth arm member 26 is typically of an &# 34 ; l - shaped &# 34 ; cantilever configuration having a third leg member 46 which slides into second leg member 38 , and a substantially perpendicular hollow fourth leg member 48 for receiving third arm member 24 . third leg member 46 includes a pin 50 which prevents fourth arm member 26 from being inadvertently separated from fifth arm member 28 during adjustment . note also that second leg member 38 includes a knob 52 which serves to tighten a cinch pin or screw bolt against third leg member 46 to lock in position and prevent further movement of fourth arm member 26 once it is adjusted in position . third arm member 24 slides into fourth leg member 48 and is locked into place by knob 54 which serves to tighten a cinch pin or screw bolt against third arm member 24 . third arm member 24 also includes a pin 56 at one end which prevents separation of third arm member 24 from fourth arm member 26 during adjustment . referring also to fig3 third arm member 24 includes a ball 58 joined at one end by threaded shaft 60 . this permits third arm member 24 to be pivotally coupled to second arm member 22 . second arm member 22 is typically of an &# 34 ; l - shaped &# 34 ; cantilever configuration having a fifth leg member 62 which receives ball 58 , and a substantially perpendicular hollow sixth leg member 64 for receiving first arm member 20 . located within and slidably coupled to fifth leg member 62 is a piston 66 , one end of which is rounded and tapered to seat against ball 58 . also located within fifth leg member 62 is a stationary seat 64 which also has an end which is rounded and tapered to seat against ball 58 . when it is desired to lock second arm member 22 and third arm member 24 into position , knob 70 is rotated until threaded shaft 72 compresses piston 66 against ball 58 . end plug 74 provides a threaded receptacle attached to fifth leg member 62 for receiving threaded shaft 72 . running lengthwise through sixth leg member 64 is a threaded shaft 76 . the lower end of threaded shaft 64 floats , while the upper end of threaded shaft 64 is rotatably coupled to sixth leg member 64 . threaded shaft 76 rotates freely within sixth leg member 64 and is coupled thereto with clip washers 78 , 80 which hold it in place . knob 82 is joined to the upper end of threaded shaft 76 to facilitate rotation thereof . one end of first arm member 20 includes threads 84 through which threaded shaft 76 extends . by rotating knob 82 , first arm member 20 can be extended or retracted . note also that first arm member 20 includes a slot 86 through which threaded shaft 76 is housed . while the tubular arm and leg members of the apparatus 10 are shown to be square , it should be noted that they may also be round or other shapes without departing from the scope of the invention . in addition , any rigid material such as aluminum , steel , plastic or the like can be used in the construction of apparatus 10 . stainless steel is typically preferred in a hospital environment . referring now to fig4 transducer clamp 16 includes , as a first clamp member , a clamp body 88 which is joined to first arm member 20 using screws 86 or the like which extend through holes 90 , through holes 92 and into threaded , holes 94 . coupled to clamp body 88 as a second clamp member is clamp door 96 which pivots about pin 98 . pin 98 extends through holes 100 , 102 as well as through hole 104 to provide this pivot . when clamp door is closed , the shaft 106 of lock 108 is extended through holes 110 , 112 as well as through hole 114 . locking ball 116 will then prevent lock 108 from being removed until button 118 is depressed . button 118 is normally extend by means of a spring ( not shown ) and is attached to a shaft ( not shown ) which causes locking ball 116 to be in either a fixed or moveable position . the closure of clamp body 88 and clamp door 96 forms receptacle 18 into which transducer 12 can be inserted and supported . referring also to fig3 transducer clamp 16 includes seating material 120 which is foam , rubber or the like , to line the surface defining receptacle 18 . this material prevents slippage of transducer 12 . it should also be noted that fig4 shows one embodiment of transducer clamp 16 . this particular configuration is suited for the physical characteristics of certain transducers . other shapes and configurations of transducer clamp 16 are equally suited depending upon the particular transducer 12 to be used . accordingly , it will be seen that this invention provides for accurate positioning and application of pressure during ultrasound - guided compression repair of arterial defects . although the description above contains many specificities , these should not be construed as limiting the scope of the invention but as merely providing illustrations of some of the presently preferred embodiments of this invention . thus the scope of this invention should be determined by the appended claims and their legal equivalents .
a support apparatus for transducer of the type used in ultrasound - guided compression repair of arterial defects such as pseudoaneurysms and arteriovenous fistulas . the apparatus includes a plurality of articulating arms which are releasably lockable into selected positions . attached to one end of the arm structure is a base member which supports the arm structure in a free - standing configuration . located at the other end of the arm structure is a clamp member having a central body which receives and holds the transducer . pressure applied by the transducer is controlled by adjustment of a guide member which is positioned between the arm structure and the clamp member .