A device for insertion into a body cavity, the device comprising: a disposable device body (300, 300a, 400) having a proximal end and a distal end (304a, 404a), the distal end (304a, 404a) being configured to be at least partially inserted into the body cavity; the disposable device body (300, 300a, 400) being an anatomically shaped laryngoscope with metal blade comprising: an access channel (301, 401), the access channel (301, 401) having a release at distal and proximal ends of the disposable device body (300, 300a, 400), where the access channel (301, 401) is open in different sides of the disposable device body (300, 300a, 400), an opto-electronic illumination and imaging module located on the disposable device body (300, 300a, 400); electrical lines embedded in the disposable device body (300, 300a, 400) such that the electrical lines extend from the proximal end of the disposable device body (300, 300a, 400) to the distal end (304a, 404a) of the disposable device body (300, 300a, 400); an external power source, control electronics, and display device electrically coupled to the opto-electronic illumination and imaging module via a flexible Universal Serial Bus cable (205a, 205b) configured to electrically connect each of the power source, control electronics, and display device to the electrical lines, and at least one air-tight tubular channel (306a-c) running along the disposable device body (300, 300a, 400), next to the electrical lines, along the length of the access channel (301,401), inside the device body (300, 300a, 400) wherein the access channel (301, 401) is configured to provide an endo-tracheal tube access to a trachea characterised in that the access channel (301, 401) comprises an opening which turns on multiple sides of the device body to maintain the position of the endo-tracheal tube or other instruments within the channel during operation, and provides cut-outs on multiple sides of the device for insertion and release of the endo-tracheal tube and other instruments. a disposable device body (300, 300a, 400) having a proximal end and a distal end (304a, 404a), the distal end (304a, 404a) being configured to be at least partially inserted into the body cavity; the disposable device body (300, 300a, 400) being an anatomically shaped laryngoscope with metal blade comprising: an access channel (301, 401), the access channel (301, 401) having a release at distal and proximal ends of the disposable device body (300, 300a, 400), where the access channel (301, 401) is open in different sides of the disposable device body (300, 300a, 400), an opto-electronic illumination and imaging module located on the disposable device body (300, 300a, 400); electrical lines embedded in the disposable device body (300, 300a, 400) such that the electrical lines extend from the proximal end of the disposable device body (300, 300a, 400) to the distal end (304a, 404a) of the disposable device body (300, 300a, 400); an external power source, control electronics, and display device electrically coupled to the opto-electronic illumination and imaging module via a flexible Universal Serial Bus cable (205a, 205b) configured to electrically connect each of the power source, control electronics, and display device to the electrical lines, and at least one air-tight tubular channel (306a-c) running along the disposable device body (300, 300a, 400), next to the electrical lines, along the length of the access channel (301,401), inside the device body (300, 300a, 400) an access channel (301, 401), the access channel (301, 401) having a release at distal and proximal ends of the disposable device body (300, 300a, 400), where the access channel (301, 401) is open in different sides of the disposable device body (300, 300a, 400), an opto-electronic illumination and imaging module located on the disposable device body (300, 300a, 400); electrical lines embedded in the disposable device body (300, 300a, 400) such that the electrical lines extend from the proximal end of the disposable device body (300, 300a, 400) to the distal end (304a, 404a) of the disposable device body (300, 300a, 400); an external power source, control electronics, and display device electrically coupled to the opto-electronic illumination and imaging module via a flexible Universal Serial Bus cable (205a, 205b) configured to electrically connect each of the power source, control electronics, and display device to the electrical lines, and at least one air-tight tubular channel (306a-c) running along the disposable device body (300, 300a, 400), next to the electrical lines, along the length of the access channel (301,401), inside the device body (300, 300a, 400) wherein the access channel (301, 401) is configured to provide an endo-tracheal tube access to a trachea characterised in that the access channel (301, 401) comprises an opening which turns on multiple sides of the device body to maintain the position of the endo-tracheal tube or other instruments within the channel during operation, and provides cut-outs on multiple sides of the device for insertion and release of the endo-tracheal tube and other instruments.