| 摘要 |
PCT No. PCT/GB96/03258 Sec. 371 Date Aug. 4, 1998 Sec. 102(e) Date Aug. 4, 1998 PCT Filed Dec. 27, 1996 PCT Pub. No. WO97/24529 PCT Pub. Date Jul. 10, 1997A fluid delivery apparatus comprising two or more delivery syringes (17), each delivery syringe comprising a syringe housing (18) defining a tube with a passage having a fluid outlet, and a syringe plunger arranged to slide axially within the tubular passage and seal one end of the tubular passage. The apparatus also includes a syringe plunger drive arranged to drive the syringe plunger along at least part of the length of the tubular passage according to a predetermined velocity profile or the delivery syringe and discharge fluid through the fluid outlet. The predetermined velocity profile of each delivery syringe is such that, in use, a combined flow rate fluid discharge simultaneously from the outlets from the delivery syringes is maintained substantially constant over at least a quarter of the range of movement of each of the plungers. In a preferred example, the syringe plunger drive comprises a rotatable cam (2) and a cam follower (14), being coupled to the syringe plunger to drive the syringe plunger as the cam is rotated.
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