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Describe the structure of the lymphatic system.Analyze the function of the lymphatic system.Identify the characteristics and treatment of
common lymphatic disorders.Apply standard precautions.
Bell Ringer
Complete the first column o the Anticipation Guide. WITHOUT the Book! Then Read….
THE PAGE NUMBERS are 310-313
Bell…. Pop Quiz
List one function of the Lymphatic System
Put your name on the paper and pass it up!
What the heck does it do….
Transports digested fat from the intestine to the bloodstream
Removes and destroys toxic substances Resists the spread of disease throughout
the body.
Structures….
LYMPH – fluid that goes between capillary blood and tissues.
LYMPH VESSELS – transport excess tissue fluid back into circulatory system.
LYMPH NODES – produce lymphocytes, filter out harmful bacteria.
SPLEEN – produces lymphocytes and monocytes, blood reservoir, recycles old red cells.
Thymus gland – produces T-LYMPHOCYTES
Straw-colored fluid (similar to plasma) INTERSTITIAL FLUID or tissue fluid because it is in the
spaces between cells Composed of H2O, lymphocytes, some granulocytes,
O2, digested nutrients, hormones, salts, CO2 and urea. NO red blood cells or protein molecules (too large) Carries digested food, O2 and hormones to cells Carries wastes back to capillaries for excretion Since the lymphatic system has no pump, skeletal
muscle action squeezes lymph along Valves prevent backward flow
Closely parallel veins Located in almost all tissues and
organs that have blood vessels Tissue lymph enters small lymph
vessels which drain into larger vessels called lymphatics – they flow into one of two large, main lymphatics – the 1)THORACIC DUCT and 2)right lymphatic duct.
1)THORACIC DUCT gets lymph from left side of chest, head and neck, abdominal area and lower limbs left subclavian vein superior vena cava heart.
2)right lymphatic duct-lymph from right arm, right side of head and upper trunk.
Lymph flows only in one direction – from body organs to the heart.
Palpation of lymph nodes: Anterior cervical chain
Regional lymphatics and drainage patterns of the left breast
Tiny, oval shaped - size of pinhead to size of almond
Located alone or grouped Site for lymph production
and filter for screening out harmful substances
If substance can’t be destroyed, node becomes inflamed
Bell……
Make sure this is complete!...Workbook pgs 191-192 A and B
Get out your packets/outlines Tonsils Spleen Thymus
Small Group Project You are expected to participate You are expected to present Yes, this counts as a grade! You have 20 minutes to complete. Some of you are
done,.stay in your seat!
Masses of lymphatic tissue that produce lymphocytes and filter bacteria – they get smaller in size as person gets older
The spleen performs many important functions related to the immune system.
Sac-like mass of lymphatic tissue
Upper left abdominal cavity, just below diaphragm
Forms lymphocytes and monocytes
Filters blood Stores large amounts of
RBCs – contracts during vigorous exercise or loss of blood, to release RBCs
Destroys or removes old or fragile RBCs
Bellringer
Complete 3rd column of Anticipation Guide…Grade yourself!
Complete workbook 191 A-F Complete 1-5 pg 304
Bell
Text page 324 9 & 10
You will be taking notes during the presentations on the forms on your desks
Define
Normal Defense/individual’s immune system
What is it’s unique feature? Page 314, text
***Chain of Infection Group GO!
Small Group Project
You are expected to participate You are expected to present Yes, this counts as a grade!
http://www.cbsnews.com/video/watch/?id=7053834n
– the body’s ability to resist bacterial invasion and disease.
2 general types – natural and acquired.
NATURAL IMMUNITY – at birth, inherited and permanent. Includes: Unbroken skin Mucus and tears Blood phagocytes Local inflammation
Acquired artificially by injecting antibodies to protect from a specific disease
Immediate immunity Lasts 3-5 weeks Used when someone exposed to measures,
tetanus, infectious hepatitis Mother provides newborn with some passive
immunity
ACTIVE ACQUIRED IMMUNITY
– lasts longer, two types NATURAL ACQUIRED IMMUNITY – result of
having had and recovered from a disease. For example, a child who had measles will usually not get it again – child’s body has manufactured antibodies.
ARTIFICIAL ACQUIRED IMMUNITY – comes from being vaccinated
– artificial resistance to a particular infection by artificial means
Antigen injected into a person to stimulate production of antibodies
Assignment
Complete worksheet from packet “Immunity Chart”
Text page 326 matching From overhead notes complete the
outline
Viruses: Smallest organisms Electron Microscope. Cannot reproduce unless inside another living cell
Three Diseases… Hepatitis B-HBV virus
Transmitted blood body secretions
Liver destruction Vaccine Viruses: Smallest
organisms Electron Microscope. Cannot reproduce unless inside another living cell
Hepatitis C-HCV Transmitted blood body
secretions Liver destruction
AIDS/HIV-Acquired Immune Deficiency syndrome virus
Cannot fight cancers and infections
No cure
OSHA
passed regulations in 1991 requiring all health care facility employers to:
- Determine which employees will have exposure to blood and body fluids
- Provide Hepatitis B vaccine free to employees with exposure risk (or signed refusal)
- Provide personal protective equipment (PPE) such as gloves, gowns, lab coats, masks, and face shields
- Provide adequate hand washing facilities and supplies
- Ensure clean & safe work environment - Follow decontamination protocol for contaminated
surfaces - Dispose of infectious wastes correctly - No eating, drinking, smoking, handling contact
lenses, applying lip balm, etc. in risk area
ADENITIS – swelling in the lymph glands TONSILLITIS In childhood, they may become infected,
enlarged, and cause difficulty swallowing Surgery done in extreme cases LYMPHADENITIS – enlargement of the lymph
nodes, occurs when infection is present and body is attempting to fight off the infection.
HODGKIN’S DISEASE – cancer of the lymph nodes, painless swelling of lymph nodes is early symptom. Rx – chemotherapy and radiation
Caused by virus Frequently in young
adults and children Spread by oral contact
(kissing) Symptoms – enlarged
lymph nodes, fever, physical and mental fatigue, leukocytes
Rx – bed rest
HYPERSENSITIVITY
When the body’s immune system fails to protect itself against foreign material, and instead, the antibodies formed irritate certain body cells.
An abnormal response to a drug or allergen.
An ALLERGEN is an antigen that causes allergic responses. (Examples of allergens – ragweed, penicillin, bee stings, foods, etc.)
severe, sometimes fatal allergic reaction Antigen-antibody reaction stimulates a
massive secretion of histamine Symptoms – breathing problems,
headache, facial swelling, falling blood pressure, stomach cramps, and vomiting
Rx – adrenaline
AIDS/HIV Acquired Immunodeficiency Syndrome Caused by HTLV-III (human T-lymphotrophic virus type III) Commonly caused HIV
or Human immunodeficiency virus. Affects not only homosexual males but all populations The patient with AIDS cannot fight off cancers and most infections. Three responses to HIV infection: AIDS ARC (AIDS-related complex) Asymptomatic infection Screening tests for HIV/AIDS are available AIDS Most severe type of HIV infection Subject to OPPORTUNISTIC INFECTIONS – a healthy person would fight off
these infections, but a person with AIDS has a compromised immune response. Symptoms of AIDS Prolonged fatigue Persistent fevers or night sweats Persistent, unexplained cough Thick coating in throat or on tongue Easy bruising, unexplained bleeding Appearance of purple lesions on mucous membranes or skin that don’t go away Chronic diarrhea Shortness of breath Unexplained lymphadenopathy Unexplained weight loss, 10 pounds or more, in less than 2 months Incubation period: 1 month to12 years
The AIDS Patient
Sometimes treated as outcasts Healthcare worker should be supportive Use of gloves for normal patient contact
is not necessary
AIDS-RELATED COMPLEX (ARC)
Has HIV but not AIDS and develops other conditions such as:
Chronic diarrhea Chronic lymphadenopathy Unexplained weight loss If life threatening opportunistic infections
develop, then individual is said to have AIDS ASYMPTOMATIC INFECTION - Has HIV but
no symptoms.
– EVERYONE who participates in risky behaviors. Transmission by: Sex with someone who is HIV positive Sharing needles with infected IV drug users At birth from infected mother Cannot be spread by: Casual contact Through air, feces, food, urine or water Coughing, sneezing, embracing, shaking hands and
sharing eating utensils Prevention: Avoid risky behaviors Standard precautions
Assignments/expectations for Monday!….
Take 10 notes from video Test is on Tues., covers chapters 15 and 16 Study with the disk in you book (at home) Return to your presentation/ Small groups
*each group may submit 2 questions for clarification!
Write # of your question on master-up front.
Study the mult. Choice Questions!
Bell
Your papers from yesterday are up front! Complete K Chapter 15 Page 197 in workbook These are your choices (you may have to use a medical
dictionary to clarify) Bronchitis adenitis Anemia melanoma Some types of cancer Colitis emphysema thrombocytopenia
STANDARD PRECAUTIONS Guidelines to be used in patient care setting Must be used when there is contact with blood, any body fluid (except
sweat), mucous membranes and non-intact skin. Hand washing – the single most effective way to prevent infection. Wash hands after touching body fluids, even if gloves are worn. Wash hands immediately after removing gloves, between patient contacts. Use a plain (non-antimicrobial) soap Wash for a minimum of 20 seconds Gloves – worn when touching blood, body fluids, etc. Mask, eye protection, face shield and gown – during patient care activities
that may generate splashes or sprays of blood, body fluids, etc. Patient care equipment and linens – handle with care, don’t let it touch
your or clothing, clean or discard appropriately.
Occupational Health and Blood Bourne Pathogens
Beware of needles! Never recap used needles. Dispose of all needles and sharp objects in
sharps container. Use mouthpieces, resuscitation bags, or other
ventilation devices as alternative to mouth-to-mouth resuscitation.
A patient who contaminates the environment should be in a private room or relatively isolated area.