in the following description , numerous specific details are set forth to provide a thorough understanding of embodiments of the present disclosure . however , one having an ordinary skill in the art will recognize that embodiments of the disclosure can be practiced without these specific details . before the surgery is performed , the recipient site should be accessed with a computer tomography ( ct ) system or a 3 - dimantional digital camera to determine the area for fat injection . computer tomography ( ct ) is a powerful nondestructive evaluation technique for producing 2 - d and 3 - d cross - sectional images of an object from flat x - ray images . after characteristics of the internal structure of an object such as dimensions , shape , internal defects , and density are readily available from ct images , or appearance images obtained from the 3 - d camera , these obtained images are processed by a computer programming for 3d image modeling , or 3d surface topology . the robotic arm 5 automatically moves to the specific position in 3 directions : latitudinal direction , longitudinal direction , and transverse direction ( horizontal direction ) according to the obtained 3d surface topology of a computer programming . referring to fig1 , which shows a schematic view of the fat graft injection device of embodiment 1 according to the present invention . the fat graft injection device of this embodiment comprises an injection unit 1 , a storage unit 2 , a pump unit 3 , a computer 4 with a detector 42 , a robotic arm 5 , a servo motor 6 , an operation table fixation 7 , and a power supply unit ( not shown ), wherein the injection unit 1 is tubular and has a connection end 11 and a terminal 12 . as shown in fig2 a - 2c , the terminal 12 may be cylindrical or beak - like and may have one or more side holes 121 through which the fat graft can be injected into the adipose layer . in addition , the storage unit 2 connected to the injection unit 1 is used to store fat grafts obtained from the purified autologous fat graft . also , the storage unit may further comprise a case 21 formed of a rigid material to serve as a holding part of the fat graft injection device according to the present invention to protect and cover the storage unit 2 therein . the pump unit 3 is connected to the storage unit 2 via a pipeline 31 , and the storage unit 2 is disposed between the injection unit 1 and the pump unit 2 , wherein the pipeline 31 is used to provide a propulsive force to drive the fat graft in the storage unit 2 into the injection unit 1 . as such , the fat graft is delivered by the injection unit 1 through the side holes 121 to a desirable area in the adipose layer . in addition , the storage unit 3 further comprises a pump unit control panel 32 disposed on the case 21 of the storage unit 2 in a form of a combination of buttons comprising a switch button , a pressure increase button , and a pressure decrease button , to control the operation of the pump unit 3 . the switch button of the control panel 32 can turn on the pump unit 3 in a pulse manner to provide a positive pressure to inject the fat grafts from the storage unit 2 into the adipose layer through the injection unit 1 . also , the applied pressure can be regulated by the pressure increase button and the pressure decrease button , and an increase in pressure may increase the amount of fat grafts entering the adipose layer , while a decrease in pressure may reduce the amount of fat grafts entering the adipose layer . however , the storage unit 2 and the pump unit 3 can be connected by an electrical connection ( not shown ), to control the signal transmission therebetween . also , the storage unit 2 of this embodiment is connected to a power line 41 extending to the power supply unit ( not shown ) to provide electric power source of this embodiment . in this embodiment , the robotic arm 5 is connected to the injection unit 1 to rotate and move the storage unit 2 , line by line , layer by layer according to x , y axis . the robotic arm replaces manual operation and can adjust the position and angle of the storage unit 2 , thereby adjusting the positions and angles of the navigation system . in the fat graft injection device of this embodiment , a servo motor 6 is further included as a controller for the fat injection to control an automatic valve ( not shown ), which is connected and controls the injection unit to inject fat in a form of successive batch . such a servo motor connected to a computer and acts following the instruction from the computer program . referring to fig3 , which shows a schematic view of the fat graft injection device of embodiment 2 according to the present invention . the fat graft injection device is substantially the same as embodiment 1 , an except navigation system that this embodiment further comprises a microprocessor 4 connected to the storage unit 2 and the pump unit 3 in a wireless or wired manner to transmit signals with each other , to control and show each parameter in the fat graft injection device of this embodiment . the microprocessor 4 also connects to the computer . furthermore , the microprocessor 4 further comprises a sensing unit 42 which may be a three - dimensional scanner for positioning and confirming the depth and thickness of an adipose layer , and transmitting image signals to be processed by the microprocessor 4 , thereby providing information of the designated position for a surgeon to determine the position of fat grafting . referring to fig4 , which shows a schematic view of the fat graft injection device of embodiment 3 according to the present invention . the fat graft injection device is substantially the same as embodiment 2 , except that the pump unit control panel of the this embodiment is a control chip 33 for regulating the operation of the pump unit 3 in a touch manner . referring to fig5 a , which shows a schematic view of the fat graft injection device of embodiment 4 according to the present invention . the fat graft injection device is substantially the same as embodiment 2 , except that this embodiment uses a storage unit adjusting element 22 to control the flow rate of fat graft , in a manner of rotating a gear 221 by a turning button ( not shown ) to drive the rack rail 222 ′ on a partition 222 ( as shown in fig5 b ) mechanically , thereby pressing down or lifting up the partition 222 to regulate the exit diameter of the storage unit adjusting element 22 to the injection unit 1 to control the fat graft amount of each injection . however , the turning button adjusting element may also control the operation of a mechanical adjusting element according to the parameters set by the microprocessor 4 . referring to fig6 , which shows a schematic view of the fat graft injection device of embodiment 5 according to the present invention . the fat graft injection device is substantially the same as embodiment 1 , except that the electric power source of this embodiment is a battery 43 , and thus , this embodiment has the same portability with a syringe of the traditional fat graft injection device , but surpasses the traditional syringe with its automation . in summary , according to the above embodiments of the present invention , the fat grafts in the storage unit are injected into the adipose layer through the injection unit by the pump unit , and the fat graft injection is performed with a syringe pushed in an automatic manner instead of manual operation . in addition , with the microprocessor , the conditions of the surgery process can be fine - tuned , to achieve a fat graft injection with multiple lines , multiple layers , equally distributed , quantification , and constant pressure , thereby increasing survival of fat grafts and relieving considerable physical and mental fatigue of the surgeon during surgery . operation embodiment 1 : positioning of the area and thickness of the recipient site ( x , y , z axis ) before fat injection before the surgery is performed , the site for fat graft injection should be disinfected , and then a positioning needle for measuring the x , y plane is inserted at this site , as shown in fig7 a . the following steps were comprised : 1 . insert the positioning needles ( probes ) to definite the area and depth of fat injection ; 2 . navigation system is used to start to scan the surface of area defined for the volume and area of fat injection ; 3 . micro processer ( chip ) calculate and make a plan for fat injection , such as area , depth , volume , speed , and required time ; 4 . choose injection unit ( large or small diameter with different side holes ); 5 . set up the robotic system ; 6 . action . the positioning needles inserted at the x mark to determine the area for fat graft injection , and the insertion depth is set by a microprocessor unit ( such as a computer ), wherein the positioning needle is further installed with at least one sensor connected to the microprocessor unit to transmit signals with each other . for example , referring to fig7 b , four positioning needles 80 are inserted at the site graft through the dermal layer 91 to the adipose layer 92 . each of the positioning needles 80 has a first positioning sensor 801 and a second positioning sensor 802 , wherein a height h between the first positioning sensor 801 and the second positioning sensor 802 may be adjusted depending on the different thicknesses of the tissue . the first positioning sensor 801 is disposed between the dermal layer 91 and the adipose layer 92 , and the second positioning needle sensor 802 is disposed in the space between the adipose layer 92 and the muscle layer 93 . thus , the fat graft injection device will not migrate to the muscle layer . the positioning needles 80 are used not only to determine the area for the fat graft injection , but also to decide the depth ( z axis ) for the fat graft injection , as well as to provide a stereotactic positioning function , to achieve automatic fat graft injection . in addition , the sensors and the guiding unit of the present invention transmit signals with each other , and the sensors may also scan the depth for fat graft injection automatically and provide instructions of the area for fat injection . then , the x . y . and z axes are determined at the site for fat graft injection ( as shown in fig7 b ), wherein [ x × y ] is the area for fat graft injection , z is the depth of the fat . in addition , the distance between the four positioning needles is divided into “ m ” equal parts in x axis , “ n ” equal parts in y axis , and “ k ” equal parts in z axis , to lay out a grid pattern , i . e . a m × n grid pattern , in the xy plane for fat injection . “ m ” is using the unit of centimeter such 6 cm , m = 6 . thus , the fat amount and direction for fat injection are easy to control and well distributed . such a positioning system can be used to estimate the area ( m × n ), the thickness ( k − 1 ) and the volume [ m × n ×( k − 1 )], as well as the processing time for fat injection , wherein ( k − 1 ) is the thickness of the adipose layer excluding the thickness ( z - axis ) of the dermal layer . the reason for z - axis amount “ k − 1 ” is for preserving 1 cm away from the skin to avoid penetrating or uneven skin surface . therefore , after the fat injection of a predetermined plane ( as shown in fig7 b : x 1 , y 1 ) is completed , another plane for fat injection ( x 2 , y 2 ) located at a shallower position is subsequently performed , in a manner of from deep to superficial planes along the z - axis . therefore , the flatness of skin can be maintained after the fat injection surgery . in the present invention , according to the obtained 3d surface topology of a computer programming and the obtained area ( m × n cm 2 ), the thickness ( k − 1 cm ) and the volume [ m × n ×( k − 1 ) cm 3 ], multiple layers of stratification , a incisional site number and position , a moving speed of an injection unit 1 in the subcutaneous layer , and a quantity / time for the fat graft injection surgery can be calculated automatically by computer programming . in result , the fat injection using the automatic fat graft injection device of the present invention is automatically performed in the form of stratification with a specific layer numbers , numbers of incisional sites , injection route , a moving speed of an injection unit 1 in the adipose layer , and quantity / time by computer programming , wherein the fat injection at each of the subcutaneous layer may distribute evenly and smoothly , and achieve the predictive goals . although the present invention has been explained in relation to its preferred embodiment , it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed .
the present invention relates to a fat graft injection device , which comprises : an injection unit having a connection end and a terminal ; the injection unit is operated by robotic arm system in controlled speed , multiple layers , multiple lines , a storage unit connected to the injection unit ; and a pump unit connected to the storage unit , wherein the storage unit is between the injection unit and contains fat grafts . fat grafts in the storage unit are injected into the subcutaneous layer through the injection unit by the pump unit with the guiding of navigation system , thus completing the fat graft injection , with accurate and effective , manner without exhausted back and forth surgeon &# 39 ; s arm movement .