Pathology Information and Courses from MediaLab, Inc.

The prototype history for this organism is either a still birth or a neonate with death ensuing within 2 or 3 days post-partem due to high fever, sepsis, and respiratory distress. The mother usually experienced a flu-like illness late in the third trimester of pregnancy, characterized by low-grade fever, myalgias, malaise and backache. In this case, biopsy material of brain tissue obtained at autopsy was submitted to the pathology laboratory for tissue diagnosis and fluid from the pia-arachnoid was sent to the microbiology laboratory for culture.

We are all aware of the clinical laboratory's role in assessing overall health and we are also aware that measuring a patient's serum lipids will provide some insight into their cardiovascular health. The traditional measurements of low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), and triglycerides are the 'classic' cardiovascular risk markers.Laboratorians, and even the general public are now well-aware that LDL-C ('bad' cholesterol) concentrations should be low while HDL-C ('good' cholesterol) concentrations should be high. Triglycerides should be kept in check as well. Optimal levels are shown in the table below. So what is the risk if these values are not within optimal ranges?Cardiovascular risk can be simply defined as increasing the odds of having a pathology which affects blood flow and/or the heart. The most common cardiovascular pathology is atherosclerosis. Other cardiovascular pathologies whose odds increase as serum lipids and other cardiovascular markers become suboptimal are myocardial infarction (heart attack), stroke, congestive heart disease and coronary artery disease. Other diseases such as diabetes and the metabolic syndrome are also strongly associated with the classic cardiovascular risk markers LDL-C, HDL-C and triglycerides.

Effective date March 17, 2008All applicants for a Director license must meet the qualifications for a high complexity laboratory director that are defined in 42 CFR 493.1443 as published on October 1, 2007.A licensed physician may direct a clinical laboratory without a separate laboratory director's license if he / she is certified in clinical pathology by the American Board of Pathology (ABP) or the American Osteopathic Board of Pathology (AOBP); is board-certified in the pertinent laboratory speciality; and/or has four years of pertinent clinical laboratory experience (post-graduate) with two years experience in the speciality that will he/she will direct.A non-physician may obtain a director's license for a specialty area if he / she: Holds an earned doctoral degree in a chemical, biological, or clinical laboratory science Is certified in the pertinent laboratory specialty by an approved national board A director can oversee up to five laboratories.

The setting is the cafeteria in a hospital or the lounge in an independent laboratory. Two employees from different departments are old friends are having lunch together. A billing clerk and a medical technologist are friends and are having lunch together. The billing clerk mentions that she saw a bill go through the system for one of her coworkers for a biopsy. She asks the medical technologist if she has the necessary security level access to see pathology test results because she is concerned about the welfare of the coworker. The medical technologist does have the necessary security clearance to see the results. She should:Correct Answer: Refuse to look up the results for the clerk and remind the clerk that it is a violation of compliance policies to do so, or to ask another to do so. Remind her of the requirement for each employee to report any violations of policy. Discussion: The Medical technologist has a responsibility to report violations of compliance policies and the friend has put her in a difficult position. For that reason, it is not enough to just refuse the clerk's request. If the medical technologist does not take the responsibility to inform the employee of the policy then there is a possibility that the employee would ask some other employee to do it for her.

The setting is the cafeteria in a hospital or the lounge in an independent laboratory. Two employees, a billing clerk and a medical technologist, from different departments are having lunch together. The billing clerk mentions that she saw a bill go through the system for one of her coworkers for a biopsy. She asks the medical technologist if she has the necessary security level access to see pathology test results because she is concerned about the welfare of the coworker. The medical technologist does have the necessary security clearance to see the results. She should:Correct Answer: Refuse to look up the results for the clerk and remind the clerk that it is a violation of compliance policies to do so, or to ask another to do so. Discussion: The medical technologist has a responsibility to report violations of compliance policies and the friend has put her in a difficult position. For that reason, it is not enough to just refuse the clerk's request. If the medical technologist does not take the responsibility to inform the employee of the policy then there is a possibility that the employee would ask some other employee to do it for her.

Since these recommendations have been adopted by many groups, including the College of American Pathologists and the Centers for Disease Control, we will be using them as our criteria for differentiating between bands and segs.This definition was first reported by the Committee for Clarification of the Nomenclature of Cells and Diseases of the Blood and Blood Forming Organs, in the American Journal of Clinical Pathology (18:443-450, 1948).

It is important to always dispose of contaminated wastes properly!Examples of contaminated wastes: Microbiology waste and pathology waste All body fluids, such as pleural fluid Contaminated sharps and blood specimens

Formaldehyde is a preservative, ideally used in: Histology laboratories Autopsy laboratories Surgical pathology Anywhere biopsies are performed

Respirators usually are not needed in a pathology laboratory. However, they are required if exposure exceeds the Action Level of 0.5 ppm. Respirators, if required, must be provided to you at no cost.

Formaldehyde solution is a colorless, aqueous liquid with a pungent odor. Concentrated formaldehyde solutions contain not less than 37% of formaldehyde or CH2O. These are usually supplied in 55 gallon drums. Ten percent (10%) aqueous formaldehyde solution, known as formalin , is almost universally used in the histology laboratory to fix and store pathology specimens, and, while still an important potential health hazard, is safer to use because of its lower formaldehyde concentration.

TDM provides a quantitative measure of the circulating concentration of a drug. The physician determines if the dosage of the drug needs to be adjusted based on this information.If a drug concentration is determined to be outside the therapeutic range, it may be for one of the reasons listed in the table below. Reason Discussion Noncompliance Patients may (intentionally or unintentionally) not take the drug. TDM can thus help monitor compliance. Dosing errors The dose may have been erroneous or inappropriate given the patient's condition. Malabsorption The TDM result will reveal if the drug cannot be absorbed well through the gut and an alternative route of administration will be needed. Drug interactions Many drugs interfere with the absorption or metabolism of other drugs. These interactions will be revealed by TDM. Kidney or liver disease Any pathology that affects elimination will cause an elevation in a drug level that will be unmasked by TDM. Altered protein binding Changes in serum proteins can lead to big changes in the amount of free drug in serum. Variations in the genetics of drug-metabolizing enzymes can also affect drug concentrations in the body. This is the field of pharmacogenomics that will be discussed later in the course.