External neurostimulator
An external neurostimulator includes a housing including a base housing and a top housing, a power source, a pulse generator, and a first and second series of spring-loaded pins electrically coupled to the pulse generator. The top housing includes a central portion, a first side door hingedly coupled to a first side of the central portion, and a second side door hingedly coupled to a second side of the central portion. Each of the first side door and the second side door include a channel formed thereon that is configured to directly receive a proximal end portion of an implantable lead. Each channel includes a series of longitudinally spaced-apart openings formed on the first side door and the second side door, respectively. The first and second series of spring-loaded pins extend through the series of longitudinally spaced-apart openings of the channel on the first and second side doors, respectively.
1 . An external neurostimulator comprising:
a housing, wherein the housing includes
a base housing including a surface configured to contact a patient's skin, and
a top housing including a central portion, a first side door hingedly coupled to a first side of the central portion, and a second side door hingedly coupled to a second side of the central portion, wherein each of the first side door and the second side door include a channel formed thereon that is configured to directly receive a proximal end portion of an implantable lead and wherein each channel includes a series of longitudinally spaced-apart openings formed on the first side door and the second side door, respectively;
a power source disposed within the housing;
a pulse generator disposed within the housing, wherein the pulse generator is electrically coupled to the power source; and
a first series and a second series of spring-loaded pins electrically coupled to the pulse generator, wherein the first series of spring-loaded pins extend through the series of longitudinally spaced-apart openings of the channel on the first side door and the second series of spring-loaded pins extend through the series of longitudinally spaced-apart openings of the channel on the second side door,
wherein the base housing includes at least one press fit feature configured to mate with an opening formed on an underside surface of the central portion of the top housing such that the base housing is attached to the top housing via the press fit feature.
2 . The external neurostimulator of claim 1 , wherein each of the first side door and the second side door has a locked configuration and an unlocked configuration.
3 . The external neurostimulator of claim 2 , wherein the central portion of the top housing includes a first tab and a second tab, the first and second tabs opposing each other and including a hook formed on outermost end thereof,
wherein in the locked configuration of the first side door, the hook of the first tab is received within a recess formed on an inner surface of the first side door, and
wherein in the locked configuration of the second side door, the hook of the second tab is received within a recess formed on an inner surface of the second side door.
4 . The external neurostimulator of claim 3 , wherein each of the first side door and the second side door include a latch having an opening formed therethrough, each latch extending towards the base housing, and wherein the base housing includes a first post extending outwardly therefrom and a second post extending outwardly therefrom, the latch of the first side door being configured to receive the first post and the latch of the second side door being configured to receive the second post.
5 . The external neurostimulator of claim 4 , wherein the opening of each latch includes a top circular portion, a bottom circular portion, and a waisted portion disposed between the top and bottom circular portion, and wherein in the locked configuration of the first side door, the first post is disposed in the top circular portion of the opening of the latch of the first side door, and wherein in the locked configuration of the second side door, the second post is disposed in the top circular portion of the opening of the latch of the second side door, and wherein in the unlocked configuration of the first side door, the first post is disposed in the bottom circular portion of the opening of the latch of the first side door, and wherein in the unlocked configuration of the second side door, the second post is disposed in the bottom circular portion of the opening of the latch of the second side door.
6 . The external neurostimulator of claim 3 , wherein a boss is formed on each of the first tab and the second tab, each boss being configured to apply pressure onto the proximal end portion of the implantable lead when the first side door or the second side door, respectively, is in the locked configuration.
7 . The external neurostimulator of claim 6 , wherein a top surface of each boss is curved.
8 . The external neurostimulator of claim 3 , wherein the base housing includes a first snap fit feature and a second snap fit feature extending therefrom, the first snap fit feature configured to mate with an opening formed on an underside surface of the first tab of the central portion and the second snap fit feature configured to mate with an opening formed on an underside surface of the second tab of the central portion.
9 . The external neurostimulator of claim 1 , wherein the channel for each of the first side door and the second side door includes a first end and a second end opposing the first end, the first end being configured as a lead insertion entry point, wherein the first end of the channel for each of the first side door and the second side door includes a horseshoe-shaped surface protrusion formed adjacent thereto.
10 . The external neurostimulator of claim 1 , wherein the channel for each of the first side door and the second side door includes a first end, a second end opposing the first end, and a notch formed between the first end and the second end, the notch extending outwardly from a longitudinal axis of the channel and being configured as a lead depth indicator point.
11 . The external neurostimulator of claim 1 , wherein the channel for each of the first side door and the second side door includes a circular portion configured to receive the proximal portion of the implantable lead and a trapezoidal portion configured to receive a stylet.
12 . The external neurostimulator of claim 1 , wherein each spring-loaded pin of the first series and the second series of spring-loaded pins is configured to contact a connection contact of the proximal portion of the implantable lead.
13 . The external neurostimulator of claim 1 , wherein the housing has a height of between 18 mm and 22 mm.
14 . The external neurostimulator of claim 1 , wherein the base housing has a curved perimeter.