The grades of 4 Health Care Equipment & Supplies stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

ResMed Inc. (RMD) shows solid improvement this week. The company’s rating rises from a C to a B. ResMed Inc. develops, manufactures and distributes medical equipment for treating, diagnosing and managing sleep-disordered breathing and other respiratory disorders. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of RMD stock.

Cynosure, Inc. Class A (CYNO) is seeing ratings go up from a B last week to a A this week. Cynosure, Inc. Class A develops, manufactures, and markets aesthetic treatment systems to the dermatology, plastic surgery, and general medical markets. The company also gets A’s in sales growth and earnings surprise. For more information, get Portfolio Grader’s complete analysis of CYNO stock.

Span-America Medical Systems, Inc. (SPAN) earns a B this week, jumping up from last week’s grade of C. Span-America Medical Systems, Inc. manufactures and distributes a variety of therapeutic support surfaces and related products made from polyurethane and other foam products for the medical, consumer and industrial markets. The company also gets A’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of SPAN stock.

The rating of Cerus Corporation (CERS) moves up this week, rising from a C to a B. Cerus Corporation is a biomedical products company engaged in the development and commercialization of the INTERCEPT Blood System. For more information, get Portfolio Grader’s complete analysis of CERS stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.