Squirt technique

Also, the microcoils are deliverable by the Squirt technique. The Squirt technique is suitable for delivery of all pushable fibered microcoils (0.018 in.) through microcatheters with 0.016- to 0.027-in. end-holes. The microcoil is loaded into the microcatheter and preferably a 3-ml luer lock syringe, filled with saline is attached to the hub of the microcatheter. Under fluoroscopic guidance, the microcoil is delivered with small boluses of saline. Final adjustment of the microcoil is accomplished by moving the microcatheter before final deployment of the coil, if... 

Of note though, the Squirt technique should not be used for deployment of the first microcoil for treatment of a PAVM or other fistula. In this instance the coil may pass directly through the fistula. 

For large lumen microcatheters, it is necessary to use a 0.021 or 0.025-in. pusher wire to avoid catheter occlusion. In the newer microcatheters (Renegade Hi-Flo, Boston Scientific Progeat 2.7, Terumo or Embo-cath. Biosphere Medical), the use of standard 0.016-in. pusher wires will cause trapping of microcoils between the inner diameter of the microcatheter and the microcoil. To avoid this the squirt technique is utilized or a larger pusher wire is required. 

If you know you have a leak but are not sure of the location, do not use a flame to aid your search. If the gas is flammable, the dangers are obvious, but otherwise there is concern of burning parts and equipment. The best and safest technique is to spray, squirt, or drip a soapy water solution on the suspected area. Use either a diluted liquid dish soap or a commercial solution such as Snoop . The evidence of bubbles is a sure sign of a leak. However, be sure you witness bubble formation as opposed to bubbles just sitting there, which are likely to have formed during the application of the bubble solution. 

As stated before, the Tesla coil cannot be used on metal systems. If a leak on a metal system is large enough to prevent you from using a mass spectrometer (or you do not own a mass spectrometer), you may be able to use positive pressure to locate leaks in a vacuum system. Place the vacuum system under pressure with dry air, nitrogen, or helium up to about 60 psig. Then squirt a soapy solution on areas in question while looking for the formation of bubbles. This technique is the same that is used on all pressure systems and is even used by plumbers when installing gas pipe. 

In addition to the epidermal abnormalities noted above, there is an increase in the number of dermal cells which is probably of secondaiy importance. However, it should be noted that Weddell (W7, W8) using special histochemical techniques has reported an increased production and breakdown of Schwann cells in the psoriatic lesion, and he believes that these changes are of primary importance in stimulating the epidermal lesion. Along similar lines is the suggestion by Pinkus and Mehregan (P7) that the polymorphonuclear leukocytes are of prime importance in stimulating the epidermis and that the dilated capillary in the papilla squirts these leukocytes into the epidermis as an initial event. 

Be sure to use a clean Pasteur pipette whenever you remove CDCI3 from its supply bottle. Avoid contaminating the stock of NMR solvent. Also be sure to fill and empty the pipette several times before attempting to remove the solvent from the bottle. If you bypass this equilibration technique, the volatile solvent may squirt out of the pipette before you can transfer it successfully to another container. 

In some cases, adequate mixing can be achieved by spinning your microspatula for at least 10 minutes in the conical vial. Another technique of mixing involves drawing up the mixture into a Pasteur pipette and squirting it rapidly back into the vial. Repeat this process for at least 5 minutes to obtain an adequate extraction. 

The filter-paper technique is much faster. A piece of filter paper is placed on the surface to be tested, and deionized water is squirted on it until it is saturated. The wet paper is then placed on an instrument (such as the SCM-400 from Elcometer) that measures its resistivity. As in the conductivity measurements discussed above, when this is used for repainting applications, it is not certain how much of the resistivity of the paper is due to chlorides and how much is due simply to rust in the test water. In all, the technique is reliable and simple to implement, although initial equipment costs are rather high. 

Fig. 6.1 The arrangement used in the flow technique for studying reaction rates. The reactants are squirted into the mixing chamber at a steady rate from the syringes or by using peristaltic pumps (pumps that squeeze the fluid through flexible tubes, like in our intestines). The location of the spectrometer (acting as a detector) corresponds to different times after initiation.

The objective of rinsing the electrodes between measurements is to prevent contamination by carry-over on the electrodes. It has become common practice to use distilled water from a squirt bottle to rinse the electrodes and then to blot them with a tissue. This practice, however, has led to the improper technique of wiping rather than blotting the electrodes. Wiping often results in slower responding electrodes, thus requiring considerable time before a stable pH reading is obtained. 

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