**3. Results**

In Figure 1, the CFE module developed with its morphological macroscopic appearance can be observed.

**Figure 1.** Picture of the esophageal flow control module – CFE; from left to right: upper and side views

The materials used in the manufacturing and packaging of the module that did withstand high temperatures, were sterilized with ethylene oxide. The materials (moulds) that withstand high temperatures were sterilized by steam autoclave.

### **3.1. Cadaver test**

176 Practical Applications in Biomedical Engineering

to determine location by means of image.

them, at the end of the experiment were evaluated.

*2.7.3. Video-endoscopy* 

material.

**2.8. Exclusions** 

**2.9. Statistical study** 

confidence interval.

**3. Results** 

be observed.

Radiographic follow-up of the animals was done of the cervical region on the lateral-right (in decubito) side, immediately after placement of the module, and every two days until its removal. The test was done in the radiology laboratory at the Veterinary School at UFG, according to the following protocol: 55 kV, 300 mA, 0.04 second of exposure in a right-lateral ducubitus position. A normal esophagus is not visible radiographically, because it is a close to collapsing organ and the module behaves like a foreign body (filled with gas), making it possible to visualize it radiographically. Thus, due to the radiopacity of the gas, it is possible

A video-endoscopy was performed on the 15th day, after withdrawal of the module. The procedure was analogous to that used during placement, utilizing the same endoscopic

There were no exclusions of the dogs, including those that expelled the modules. All of

The statistical hypothesis t-student test was used here to make a comparison between the groups (small samples). All discussions of the present study were carried out with a 99%

In Figure 1, the CFE module developed with its morphological macroscopic appearance can

**Figure 1.** Picture of the esophageal flow control module – CFE; from left to right: upper and side views

The materials used in the manufacturing and packaging of the module that did withstand high temperatures, were sterilized with ethylene oxide. The materials (moulds) that

withstand high temperatures were sterilized by steam autoclave.

*2.7.2. X-rays* 

In this study, a guide needed for pulling the device through to the inside of the esophagus was developed. During the removal procedure, the external wall of the module was perforated for deflation and it was removed with endoscopic forceps.
