The circulating DNA techniques still need to be vetted on a large scale, and they face competition from other diagnostic tests that rely on blood-borne hormones, metabolites, and other nongenetic molecules.
The new, air-circulating technique for NGT flushing described here uses the simple observation of air flushed in the side port circulating out the suction port as the key indicator of an empty stomach, as illustrated in Fig. 5.
In this study, ultrasonic circulating extraction (UCE) technique was firstly and successfully applied for extraction of samara oil from Acer saccharum.
Following cessation of flow due to blocked NGT orifices (this occurred every time), two flushing techniques were compared, the conventional technique, and the new, air-circulating technique.
The new, air-circulating technique: A simple, 8-step flushing technique, was designed to overcome the problem of the gastric mucosa occluding the suction orifices.
By contrast, the new, air-circulating technique was significantly more effective at emptying the "stomach," and the GRV returned essentially to nearly zero (Fig. 2, P <0.02).
To confirm these promising results, and to test the efficacy of the new, air-circulating technique in living stomachs, we performed the same comparison in pig stomachs.
Once this point was reached, the tubes were flushed according to either the conventional technique or the new, air-circulating technique (see below), following which the trial was terminated and the volume of fluid aspirated was subtracted from the fluid instilled (the initial 500 mL + the amount flushed) to obtain GRV.
Recently reported studies indicate that, with modern detection techniques, circulating tumor cells (CTCs) could provide a reliable and convenient source for clinically relevant analysis.
This technique involves circulating polyethylene glycol solution (PEG) over a semi-permeable membrane underlying a test specimen.
Despite such beliefs, no studies have shown a convincing and sustained effect of continuous hemofiltration technique on circulating cytokine levels compared with continuous hemodialysis.
