Method for obtaining sterile human amniotic fluid and uses thereof
Provided herein is a pre-Caesarean method for collecting amniotic fluid from a patient. A needle is inserted into the incision site for the future C-section, which may be under ultrasound guidance, through which the amniotic fluid is drawn under a low level suction and, optionally, gravity to a sterile collection container. The method encompasses filtering and/or irradiating the amniotic fluid to collect biomolecules of interest such as growth factors and/or stem cells. Also provided is the sterile amniotic fluid or filtrates thereof collected by the method described herein.
1. A method of obtaining sterile filtered acellular non-irradiated human amniotic fluid comprising bioactive growth factors, the method comprising serially filtering the human amniotic fluid, the steps of the method comprising:
collecting amniotic fluid under sterile conditions,
removing cells and particulate matter from the human amniotic fluid by centrifuging or depth filtering the human amniotic fluid to obtain cell-free amniotic fluid, and
serially filtering the cell-free amniotic fluid through multiple filters selected from the group consisting of filters with a pore size of 100 μm, 1.2 μm, 1.0 μm, 0.8 μm, 0.6, 0.45 μm, 0.22 μm and 0.2 μm to obtain a sterile filtered acellular human amniotic fluid without irradiation.
2. The method of claim 1 , wherein collecting of the amniotic fluid is performed under ultrasound guidance.
3. The method of claim 1 , wherein the step of collecting the amniotic fluid comprises the use of a sterile collection container, wherein the sterile collection container comprises a pump with a suction device.
4. The method of claim 3 , wherein the suction device is a low suction device or spring loaded low suction device.
5. The method of claim 3 , wherein the suction device is fluidly connected to an internal balloon.
6. The method of claim 5 , further comprising manually pumping up the internal balloon in the sterile collection container using the low suction device to allow a low-level suction and collection of the amniotic fluid.
7. The method of claim 3 , wherein the sterile collection container comprises an inlet.
8. The method of claim 7 , further comprising connecting a second end of the tubing to the inlet of the sterile collection container.
9. The method of claim 3 , wherein the sterile collection container comprises a vent having a cap.
10. The method of claim 9 , wherein the vent is resealed after full expansion of the internal balloon.
11. The method of claim 1 , comprising filtering the decellularized amniotic fluid through a 100 μm filter to remove large particles.
12. The method of claim 1 , wherein the decellularized amniotic fluid is serially passed through filters having a size of between about 10 μm and about 1 μm to remove cells.
13. The method of claim 12 , wherein the amniotic fluid is filtered through one or more filters selected from the group consisting of filters having a size of about 0.8 μm, 0.6 μm, 0.45 μm, 0.22 μm and 0.2 μm .
14. Sterile filtered non-irradiated acellular human amniotic fluid prepared by the method of claim 1 .