Sampling device capable of continuously sampling content in a biological conduit and method thereof

A sampling device that can entirely or partially enter into a biological conduit, and can move along the conduit for sampling content contained therein, comprising:

• a housing defining a chamber, wherein the chamber has a first opening (or inlet), a sample collector in the chamber that collects the content of the conduit;
• a collector driver that drives the sample collector;
• and
• a sample delivery that deliveries the sample collected by the sample collector to the collector driver;
• wherein the sample collector comprises a first cylindrical roller and a second cylindrical roller;
• wherein the sample delivery comprises a first convoy belt having a first sampling surface and a first back surface, and a second convoy belt having a second sampling surface and a second back surface;
• wherein the collector driver comprises a first belt source for providing the first convoy belt which is blank, and a second belt source for providing the second convoy belt which is blank;
• wherein the first and the second cylindrical rollers are in parallel with each other;
• wherein the first and the second cylindrical rollers have a gap therebetween;
• wherein the first convoy belt is configured to extend from the first belt source to the first cylindrical roller, to contact the roller with the first back surface, to wind around the roller, to expose the first sampling surface to the content in the conduit, to load the content on the first sampling surface, to pass through the gap, and to carry the loaded content through the sample delivery to the sample depository;
• wherein the second convoy belt is configured to extend from the second belt source to the second cylindrical roller, to contact the roller with the second back surface, to wind around the second cylindrical roller, to expose the second sampling surface to the content in the conduit, to load the content on the second sampling surface, to pass through the gap, and to carry the loaded content through the sample delivery to the sample depository;
• wherein the contents loaded, on the first and the second convoy belts are combined when they pass the gap, and the combined contents are sandwiched between the first and the second convoy belts;
• and
• wherein the collector driver is configured to pull the first and the second convoy belts loaded with the combined contents at a same speed toward the sample depository.