Resumes
Resumes
Zhenhua Mao Phones & Addresses
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33 Lincoln Cir E, Andover, MA 01810
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North Andover, MA
Publications
Us Patents
Field-Chargeable Transcutaneous Drug Delivery System
View pageUS Patent:
20230083092, Mar 16, 2023
Filed:
Aug 24, 2022
Appl. No.:
17/894326
Inventors:
- Natick MA, US
Mei Zhang - Sharon MA, US
Zhenhua Mao - Andover MA, US
Mei Zhang - Sharon MA, US
Zhenhua Mao - Andover MA, US
International Classification:
A61M 5/142
A61M 5/32
A61M 5/34
A61M 5/32
A61M 5/34
Abstract:
An automatic needle insertion device assists patients who may be uncomfortable with placing the needle themselves and employs a soft outer needle inserted using a rigid stylet, for example, a standard hypodermic needle, which is then removed after the soft needle is placed, greatly reducing irritation. An ambulatory pump can be filled with a variety of drugs and different amounts of drug on demand, for example, using a syringe prior to use.
Ambulatory Medical Pump Cartridge Locking System
View pageUS 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
Zhenhua Mao - Andover MA, US
Frederick Lee - Boston MA, US
Mei Zhang - Sharon MA, US
International Classification:
A61M 5/142
A61M 5/14
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.
High Precision Syringe With Removable Pump Unit
View pageUS 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
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
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.
High Precision Syringe With Removable Pump Unit
View pageUS 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
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.