Nasogastric tube with camera

1. A system comprising: a nasogastric tube comprising: (a) a main lumen having one or more proximal connectors for connecting to a source of substances or pressure, (b) at least four vacuum lumens circumferentially surrounding said main lumen, (c) at least four suction ports for circumferentially and sealingly drawing an inner wall of an esophagus thereagainst, each of said at least four suction ports associated with a different one of said at least four vacuum lumens, wherein said at least four suction ports are distributed between at least two different locations along a longitudinal axis of said nasogastric tube; and an imaging system for capturing and rendering one or more images of an area accessible by said nasogastric tube, wherein said imaging system comprises: (d) a camera that is disposed at a distal end of said nasogastric tube for capturing said images; (e) an illuminator that is disposed at said distal end of said nasogastric tube for illuminating an area surrounding said camera; (f) a processing unit that is provided at a proximal end of said nasogastric tube, configured to receive and process said captured images, render said processed images on a display screen, and provide a camera control signal to control said camera and a light control signal to control said illuminator; and (g) a valve connected to said at least four vacuum lumens, said valve configured to shift an applied vacuum between different ones of said at least four vacuum lumens, thereby: varying how said inner wall of the esophagus is circumferentially and sealingly drawn, and changing the vacuum intervals between said different ones of said at least four vacuum lumens.

2. The system according to claim 1 , further comprising:

a camera cable connecting said camera to said processing unit, wherein said images and said camera control signal are transmitted via said camera cable; and

a light cable connecting said illuminator to said processing unit, wherein said light control signal is transmitted via said light cable.

3. The system of claim 2 , wherein said camera cable and said light cable are housed in any of said at least four vacuum lumens.

4. The system according to claim 1 , further comprising a vacuum source connected to said at least four vacuum lumens.

5. The system according to claim 1 , further comprising a manifold configured to connect said at least four vacuum lumens to said valve.

6. The system according to claim 5 , wherein said manifold is transparent.

7. The system of claim 1 , further comprising an orientation adjustor controlling the orientation of said camera.

8. The system of claim 1 , further comprising a control panel for applying said camera control signal and said light control signal.

9. The system according to claim 1 , wherein said main lumen and said at least four vacuum lumens are constructed as one unit.

10. The system according to claim 1 , wherein said at least four vacuum lumens are a separate unit from said main lumen, and wherein said at least four vacuum lumens are slidable relative to said main lumen.

11. The system according to claim 1 , wherein said main lumen and said at least four vacuum lumens are arranged as concentrically arranged conduits.

12. The system according to claim 1 , further comprising one or more auxiliary suction ports proximal to said at least four suction ports.

13. The system according to claim 1 , wherein each of said at least four suction ports comprises a graduated edging.

14. The system according to claim 1 , wherein said at least four vacuum lumens comprise at least six vacuum lumens.

15. The system according to claim 1 , wherein at least one of said at least four suction ports comprises two or more suction ports, successively arranged along a portion of a longitudinal axis of said nasogastric tube.

16. The system according to claim 1 , wherein said nasogastric tube further comprises two or more longitudinal radiopaque stripes.

17. The system according to claim 1 , wherein said two or more longitudinal radiopaque stripes are embedded in an outer wall of said nasogastric tube.

18. The system according to claim 1 , further comprising at least one gastric decompression port associated with an additional at least one vacuum lumen, wherein said at least one gastric decompression port is disposed distally to said at least two different locations along a length of said nasogastric tube.

19. The system according to claim 1 , wherein said at least four suction ports are positioned on a circumference extension of said main lumen and have a concavity whose longitudinal cross-section have a shape delimited between (i) a first arc of a first circle, the first arc having a length of 25 millimeters and a height of 1.5 millimeters, and (ii) a second arc of a second circle, the second arc having a length of 15 millimeters and a height of 1 millimeter.

20. The system of claim 1 , wherein each of said at least four vacuum lumens is substantially rectangular shaped.

21. The system of claim 1 , wherein each of said at least four vacuum lumens has a width-height aspect ratio of 1:1 to 3:1.

22. The system of claim 1 , wherein each of said at least four vacuum lumens has a height of 0.3-0.8 mm.

23. The system of claim 1 , wherein each of said at least four vacuum lumens has a width of at most 1.5 mm.

24. A method comprising: introducing a nasogastric tube into an esophagus of a patient, said nasogastric tube comprising a main lumen having one or more proximal connectors for connecting to a source of substances or pressure, four or more vacuum lumens circumferential to said main lumen, four or more suction ports, each of said four or more suction ports associated with a different one of said four or more vacuum lumens, wherein said four or more suction ports are distributed between at least two different locations along said nasogastric tube, and a camera and illuminator disposed at a distal end of said nasogastric tube; introducing a valve connected to said at least four vacuum lumens, said valve configured to shift an applied vacuum between different ones of said at least four vacuum lumens; applying vacuum interchangeably to said four or more vacuum lumens so as to circumferentially sealingly draw an inner wall of an esophagus thereagainst, each time in a different location along said esophagus, wherein said valve varies how said inner wall of the esophagus is circumferentially and sealingly drawn and changes the vacuum intervals between said different ones of said at least four vacuum lumens; capturing an image by said camera of an area illuminated by said illuminator; transmitting said captured image to a processing unit; and processing and rendering said image on a display unit.

25. The method of claim 24 , further comprising adjusting a positioning of said nasogastric tube in response to said rendered image.

26. The method of claim 24 , further comprising adjusting an orientation of said camera via an orientation adjustor, in response to said rendered image.

27. The method of claim 24 , further comprising adjusting an intensity of said illuminator, in response to said rendered image.

28. The method according to claim 24 , further comprising regulating the vacuum so that a suction level is not constant over time.

29. The method according to claim 24 , further comprising regulating vacuum to said four or more suction ports of said four or more vacuum lumen, so as to create peristaltic movement or other oscillatory movement of the esophagus.