This week, the overall grades of 10 Health Care Equipment & Supplies stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

ResMed Inc. (RMD) is having a tough week. The company’s rating falls from a C to a D. ResMed Inc. develops, manufactures and distributes medical equipment for treating, diagnosing and managing sleep-disordered breathing and other respiratory disorders. For more information, get Portfolio Grader’s complete analysis of RMD stock.

CONMED Corporation (CNMD) earns a D this week, moving down from last week’s grade of C. CONMED Corporation provides orthopedic products, specializing in arthroscopy and powered surgical instruments. For more information, get Portfolio Grader’s complete analysis of CNMD stock.

Halyard Health Inc’s (HYH) rating weakens this week, dropping to a F versus last week’s D. The company also gets F’s in operating margin growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of HYH stock.

This week, Quidel Corporation’s (QDEL) rating worsens to a F from the company’s D rating a week ago. Quidel Corporation discovers, develops, manufactures, and markets rapid diagnostic products for point-of-care detection of human medical conditions and illnesses. The company also gets F’s in sales growth, earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of QDEL stock.

Mazor Robotics Ltd Sponsored ADR (MZOR) experiences a ratings drop this week, going from last week’s C to a D. The company also gets F’s in sales growth, earnings surprise, and return on equity. For more information, get Portfolio Grader’s complete analysis of MZOR stock.

This week, Syneron Medical Ltd (ELOS) drops from a D to a F rating. Syneron Medical Ltd designs, develops, and markets aesthetic medical products based on proprietary Electro-Optical Synergy technologies. The company also gets F’s in operating margin growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of ELOS stock.

Slipping from a C to a D rating, Veracyte Inc (VCYT) takes a hit this week. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of VCYT stock.

Xtant Medical Holdings, Inc. (XTNT) declines this week from a C to a D. The company also gets F’s in earnings revisions and free cash flow. For more information, get Portfolio Grader’s complete analysis of XTNT stock.

This is a rough week for Bovie Medical Corporation (BVX). The company’s rating falls to D from the previous week’s C. Bovie Medical Corporation develops, manufactures, and markets medical products and devices with an emphasis on electrosurgical generators and electrosurgical disposables in the United States, Canada, and internationally. The company also gets F’s in earnings revisions and free cash flow. For more information, get Portfolio Grader’s complete analysis of BVX stock.

Vermillion, Inc. (VRML) gets weaker ratings this week as last week’s C drops to a D. Vermillion, Inc. engages in the discovery, development, and commercialization of diagnostics tests that help physicians to diagnose, treat, and improve outcomes for patients. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of VRML 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.