Port pocket

In the case of subcutaneous ports, early wound or pocket infections can be successfully treated with aggressive antibiotics generally targeted at grampositive cocci as well. In the cancer population, we tend to treat these patients with IV rather than oral antibiotics. Despite therapy, the device should be removed when (1) the infection does not respond to IV antibiotic therapy (2) the infection initially clears but recurs when the antibiotics therapy is terminated (3) there is frank pus within the port pocket and (4) there is a frankly infected port with sepsis. 

Placement of vascular access ports is similar to that of a long-term indwelling arterial catheter. A small incision is made over the selected vein and a second incision is made lower in the anterior chest to create a pocket to house the port. The catheter is tuimeled subcutaneously from its entry point into the vein with the tip inside the right atrium. The final position of the catheter is verified by fluoroscopy, secured with sutures, and the subcutaneous pocket is closed. The port septum is easily palpable transcutaneously, and the system may be used immediately. A surgeon typically inserts the vascular access port in an outpatient setting. 

The plate heat exchanger consists of a frame in which closely spaced metal plates are clamped between a head and follower. The plates have corner ports and are sealed by gaskets around the ports and along the plate edges. A double seal forms pockets open to atmosphere to prevent mixing of product and service liquids in the rare event of leakage past a gasket. 

Cyclical opening and closing of the inlet and discharge ports occurs by the rotor s vanes passing over them. The inlet port is normally a wide opening that is designed to admit gas in the pocket between two vanes. The port closes momentarily when the second vane of each air-containing pocket passes over the inlet port. 

Compression occurs within the pockets or chambers between the blades before the discharge port is uncovered. Since the port location must be designed and built for a specific compression ratio, it tends to operate above or below the design pressure. 

Smaller machines may have a valved bypass across the inlet and outlet ports in the cylinder head, or a variable clearance pocket in... 

As he looked at the stones, he felt relieved for some reason. He had exchanged six sheep for two precious stones that had been taken from a gold breastplate. He could sell the stones and buy a return ticket. But this time I ll be smarter, the boy thought, removing them from the pouch so he could put them in his pocket. This was a port town, and the only truthful thing his friend had told him was that port towns are full of thieves. 

Fig. n.36 Photograph of an open, pocketed mechanical conveyor (a), detail of the pocketed belt (b), and some typical configurations (c) (courtesy Unltrac, Port Hope, Ont., Canada). 

Sticky or cohesive solids stick and bind within the relatively small ports of the rotary valve, gradually build up in rotor pockets, and significantly reduce capacity. 

An example of the instrumentation used in the author s laboratory is shown in Figure 1. The calorimeter part of this two-channel instrument consists of an outer aluminum cylinder (80 x 250 mm) ther-mostatted to 25°C, 30°C, or 37°C and a second inner aluminum cylinder with two column ports and a pocket for a reference thermistor. The solution to be... 

Analogous to the placement of externally tunneled catheters, there are three basic steps to the successful placement of subcutaneous ports (1) venous access, (2) pocket creation, and (3) catheter insertion. The reservoir and catheter may be attached prior to or following catheter insertion into the venous system. This distinction will modify the insertion procedure. 

Although ports can be placed within the forearm, in our practice, they are exclusively placed in the upper arm (Pearl et al. 1991 Kahn et al. 1992). Venous access is performed in the mid-portion of the upper arm so that there is adequate room to create the pocket and not interfere with elbow motion. Many patients prefer the extremity port for cosmetic reasons where the port can be covered by a short sleeve. Following insertion of the 0.018-in. guidewire, a small 4-F transition dilator is placed followed by the placement of a hemostatic sheath large enough to accommodate the catheter (typically 6 F). The sheath is flushed intermittently or placed on slow continuous infusion. 

When dealing with subcutaneous ports, choices for device revisions include (1) removal of the entire old device and insertion of a new device in an entirely different location (2) removal of the entire old device and insertion of a new device via the same venous access site and pocket (3) removing the entire old device and insertion of a new device with the same venous access site but new pocket location and (4) replacing only the catheter portion of the device. Our preference is to maintain the same venous access site and create a new pocket. As described above, local dissection at the original venous access site will allow one to maintain the same venous entry (Mauro 1998). 

Downtake or Uptake. One of the two vertical passages, built of refractory bricks, leading from the ports to the slag-pockets of an open hearth furnace. As such a furnace operated on the... 

USB fl ish drive is a semiconductor inemtirv device that plujts into a I SB port and contaitis from 32 MB to I GB or more of notivoltitile ttieniory. I liesc devices are about tlio si/e ol a ballpoint pen and can be readily carried in a pocket. 

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