Frederick V Lee

US Patent:

20210361855, Nov 25, 2021

Filed:

May 20, 2020

Appl. No.:

16/879485

Inventors:

- Natick MA, US
Zhenhua Mao - Andover MA, US
Frederick Lee - Boston MA, US
Mei Zhang - Sharon MA, US

International Classification:

A61M 5/142
A61M 5/14

Abstract:

A low-cost medical pump for ambulatory use provides an improved IV line cartridge attachment allowing for single handed, low force release while preventing inadvertent IV line cartridge release. A rotatable side lever minimizes the force required to move the locking elements against a spring biased force urging the locking elements to a locking position.

US Patent:

20200238018, Jul 30, 2020

Filed:

Mar 10, 2020

Appl. No.:

16/814008

Inventors:

- Natick MA, US
Zhenhua Mao - Andover MA, US
Mei Zhang - Sharon MA, US
Frederick Lee - Boston MA, US

International Classification:

A61M 5/315
A61M 5/145
A61M 5/31
A61M 5/172

Abstract:

A digital syringe is used with conventional polymer disposable syringe construction to be practical in the medical environment. Errors associated with the larger volumes of the syringes (which exacerbate minor errors in plunger position) and the flexibility and dimensional variations of the polymer plungers are accommodated by direct measurement of the syringe plunger position rather than indirect measurement of motor position and inference of syringe plunger position. This direct measurement eliminates mechanical tolerances (“stack up”) in the motor, gear train, and lead screw on plunger movement, an effect exacerbated by flexibility of the plunger and changes in syringe resistance and medicament viscosity, for example, with different medicaments or when the syringe is refrigerated. The digital syringe may be combined with the motor unit to provide additional versatility.

US Patent:

20200016331, Jan 16, 2020

Filed:

Jul 12, 2019

Appl. No.:

16/509701

Inventors:

- Natick MA, US
Zhenhua Mao - Andover MA, US
Mei Zhang - Sharon MA, US
Frederick Lee - Boston MA, US

International Classification:

A61M 5/145

Abstract:

A digital syringe is used with conventional polymer disposable syringe construction to be practical in the medical environment. Errors associated with the larger volumes of the syringes (which exacerbate minor errors in plunger position) and the flexibility and dimensional variations of the polymer plungers are accommodated by direct measurement of the syringe plunger position rather than indirect measurement of motor position and inference of syringe plunger position. This direct measurement eliminates mechanical tolerances (“stack up”) in the motor, gear train, and lead screw on plunger movement, an effect exacerbated by flexibility of the plunger and changes in syringe resistance and medicament viscosity, for example, with different medicaments or when the syringe is refrigerated. The digital syringe may be combined with the motor unit to provide additional versatility.

US Patent:

20190083700, Mar 21, 2019

Filed:

Sep 19, 2018

Appl. No.:

16/135603

Inventors:

- Natick MA, US
Frederick Lee - Weston MA, US

International Classification:

A61M 5/14
A61M 5/168
A61M 5/142
A61J 1/10

Abstract:

A one-time use plastic disposable lockbox enclosing an infusion system including the infusion device, method of delivery such as tubing, and source reservoir such as a fluid bag or syringe is provided. The lockbox includes first and second thermoplastic shells joinable along a separation plane to define a housing. The housing carries an IV bag volume abutting a periphery of a filled standard IV bag to restrain movement of that IV bag along the separation plane and a pump volume abutting a periphery of an IV pump to restrain movement of that IV pump along the separation plane. A channel extends between the pump volume and an exterior of the housing to allow egress of a standard IV line from the housing.