Endoscope having multiple viewing directions

A medical device, comprising:

• a shaft having a longitudinal axis;
• an image sensor;
• an elevator disposed in the shaft, wherein the elevator comprises a lumen having a distal-end opening and defining a longitudinal axis through a center of the lumen;
• and
• an actuator mechanism configured to move the elevator between a first configuration and a second configuration relative to the shaft;
• wherein in the second configuration, a portion of the shaft is positioned over and blocking at least a portion of the distal-end opening of the elevator.

A medical device comprising:

• a shaft having a longitudinal axis;
• an image sensor;
• an elevator disposed in the shaft, wherein the elevator comprises a lumen having a distal-end opening and defining a longitudinal axis through a center of the lumen;
• an actuator mechanism configured to move the elevator between a first configuration and a second configuration relative to the shaft;
• and
• an instrument disposed within the lumen of the elevator;
• wherein in the first configuration, the distal-end opening is positioned to permit the instrument to extend through a front opening of the shaft and not a lateral opening of the shaft;
• and
• wherein in the second configuration, the distal-end opening is positioned to permit the instrument to extend through the lateral opening of the shaft and not the front opening of the shaft, and a portion of the shaft is positioned over and blocking at least a portion of the distal-end opening of the elevator;
• wherein the shaft comprises an indentation sized and shaped to receive a portion of the instrument therein;
• wherein the indentation is configured to form a press-fit attachment with the portion of instrument, thereby locking the elevator in the second configuration relative to the shaft.