Добавил:
Sekretar
kiopkiopkiop18@yandex.ru
t.me/Prokururor I Вовсе не секретарь, но почту проверяю
Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз:
Предмет:
Файл:Ординатура / Хирургия / Библиотека им академика М.И. Перельмана / Книга_3621_Библиотеки_им_академика_М_И_Перельмана.pdf
X
- •Phlebotomy
- •Dedication
- •About the Authors
- •Brief Contents
- •Contents
- •Preface
- •Acknowledgments
- •Acknowledgments from the Authors
- •1.1 Phlebotomy
- •1.2 Phlebotomist’s Role
- •1.3 Healthcare Facilities
- •1.4 The Healthcare Team
- •1.5 The Medical Laboratory
- •Introduction
- •1.6 Regulatory Agencies
- •1.7 Qualities of a Phlebotomist
- •Introduction
- •2.1 Medical Biohazards
- •2.2 Personal Safety and Preparedness
- •Competency Checklist: Using an Eyewash Station
- •Competency Checklist: Safety Equipment in the Clinical Setting
- •Introduction
- •3.1 Disease Transmission
- •3.2 Controlling Infection
- •Competency Checklist: Handwashing
- •Competency Checklist: Gowning, Gloving, and Masking
- •Introduction
- •4.1 Medical Language
- •4.2 Medical Abbreviations
- •4.3 Anatomical Terminology
- •Introduction
- •5.1 Integumentary System
- •5.2 Skeletal System
- •5.3 Muscular System
- •5.4 Lymphatic and Immune Systems
- •5.5 Respiratory System
- •5.6 Digestive System
- •5.7 Nervous System
- •5.8 Endocrine System
- •5.9 Cardiovascular System
- •5.10 Urinary System
- •5.12 Test Panels and Profiles
- •Introduction
- •6.1 The Heart and Circulation
- •6.2 Blood Vessels
- •6.4 Composition of Blood
- •6.5 Hemostasis and Blood Coagulation
- •6.6 ABO and Rh Blood Types
- •Introduction
- •7.1 Laboratory Requisitions
- •7.2 Professional Communication
- •7.3 Healthcare Ethics and Law
- •7.4 Patient Identification
- •7.5 Specimen Identification
- •7.7 Documenting Specimen Collection
- •Introduction
- •8.2 Equipment Unique to Venipuncture
- •8.4 Additives and Color Coding
- •8.5 Order of Draw
- •Competency Checklist: Order of Draw for Venipuncture
- •Introduction
- •9.1 Venipuncture
- •9.2 Difficult Blood Draws
- •9.3 Venipuncture Complications
- •Competency Checklist: Transferring Specimens to Tubes
- •Competency Checklist: Venipuncture Using a Butterfly and Syringe
- •Competency Checklist: Venipuncture Using a Butterfly and Evacuated Tube Adaptor
- •Introduction
- •10.1 The Dermal (Capillary) Puncture
- •Introduction
- •11.1 Specimen Transport
- •11.2 Special Specimen Handling
- •11.3 Specimen Rejection
- •Introduction
- •12.1 Maintaining Quality
- •12.3 Quality Improvement Processes
- •Competency Checklist: Temperature Quality Control
- •Introduction
- •13.1 Blood Cultures
- •13.2 Glucose Testing
- •13.3 Neonatal Screening
- •13.4 Peripheral Blood Smears
- •13.6 Arterial Blood Collection
- •13.7 Venous Access Devices
- •Competency Checklist: Blood Culture Procedure
- •Competency Checklist: Neonatal Testing
- •Competency Checklist: Preparation of Blood Smears
- •Introduction
- •14.1 Swab Specimens
- •14.2 Sputum Specimens
- •14.3 Stool Specimens
- •14.4 Semen Specimens
- •14.5 Urine Specimens
- •14.6 Other Non-Blood Specimens
- •Competency Checklist: Throat Swab Collection
- •Introduction
- •15.1 Levels of Laboratory Testing
- •15.2 Erythrocyte Sedimentation Rate
- •15.5 Strep Screening
- •15.6 Urine Testing
- •15.7 Point-of-Care Testing (POCT)
- •15.4 Microhematocrit
- •Competency Checklist: Urine Chemical Screening
- •Introduction
- •16.1 Professional Behavior
- •16.2 Diversity in Healthcare
- •16.3 Risk Management
- •16.4 Coping with Stress
- •16.5 Professional Community
- •GLOSSARY

F: Exam Prep
Choose the best answer for each question.
43. [LO 7.1] Which of the following does not
necessarily need to be on a laboratory
requisition?
a. Laboratory accession number
b. Ordering physician information
c. Patient’s name and date of birth
d. Type of test to be performed
44. [LO 7.1] Which of the following pieces of
information found on a specimen label is not
optional?
a. Computerized bar code
b. Laboratory accession number
c. Volume and type of anticoagulant tube required
d. Time the specimen was collected
45. [LO 7.5] Specimen tubes should be labeled in
this order:
a. after obtaining the requisition, before leaving
the laboratory.
b. after entering the patient’s room, before col-
lecting the specimen.
c. after collecting the specimen, before leaving
the patient’s room.
d. after performing all collections, on arriving
back in the laboratory.
46. [LO 7.2] Which of the following behaviors will
not help calm an anxious patient?
a. Talking quickly and being direct
b. Showing respect and concern
c. Using a pleasant tone of voice
d. Dressing and acting professionally
47. [LO 7.3] Appropriate behavior for maintaining
your own privacy includes
48. [LO 7.2] What is the most appropriate way to
enter an inpatient room?
a. Walk in and ask if the patient is here, using
her first and/or last name.
b. Walk in, introduce yourself, and proceed to
check the patient’s wristband.
c. Knock, walk in, introduce yourself, and ask
for the patient by name.
d. Knock while asking permission to enter,
introduce yourself, and ask the patient her
name.
49. [LO 7.5] Which of the following specimens will
not be accepted by the laboratory and must be
re-collected? (Choose all that apply.)
a. A specimen without a label that the person
who collected it can identify
b. A specimen with its label upside down
c. A specimen with a computer label for “John
Smith” affixed over handwriting on the tube
that reads “Jonathan Smith”
d. A specimen that has a handwritten label for
“Mary Jones” but is not yet labeled with the
computer label for “Mary Jones”
50. [LO 7.4] How should a patient be identified
who cannot speak for himself? (Choose all
that apply.)
a. Check the name on the door.
b. Check the name on the wristband.
c. Check the name above the bed.
d. Check the name with the unit nurse.
51. [LO 7.3] How should you respond when
patients ask about their lab tests? (Choose all
that apply.)
a. not identifying yourself; patients know what
you want.
b. providing business cards with your contact
information.
c. not displaying your name badge when enter-
ing patient rooms.
d. stating only your first name when introducing
yourself.
Chapter Patient and Specimen Requirements
a. Tell them that they don’t need to know any-
thing at this time.
b. Inform them that you are not allowed to tell
them anything.
c. Tell them what it says on the requisition, but
no more.
d. Ask them to ask their doctor to explain the
tests to them.
Copyright © 2019 by McGraw-Hill Education

52. [LO 7.3] Why should you not collect blood from a
sleeping patient? (Choose all that apply.)
a. She might get startled.
b. She might not consent to the procedure.
c. She might jerk her arm unexpectedly.
d. She cannot help during the procedure.
53. [LO 7.3] If you collect a blood specimen on a
patient who has not given consent, he might
bring a civil lawsuit for
58. [LO 7.6] The serum of a specimen appears
slightly cloudy after centrifugation. This is a clue
that
a. the patient is in a basal state.
b. the patient is smoking cigarettes.
c. the patient was not fasting.
d. the centrifuge is malfunctioning.
59. [LO 7.6] Which of the following tests most often
needs a fasting specimen?
a. assault.
b. bat tery.
c. direct injury.
d. negligence.
54. [LO 7.3] If a patient feels threatened by the
phlebotomist, she may bring suit against the
phlebotomist under civil law for
a. assault.
b. bat tery.
c. direct injury.
d. negligence.
55. [LO 7.3] Which of the following is not acceptable
for patient consent concerns?
a. Patients give consent by simply being admit-
ted to the hospital.
b. The phlebotomist explains the procedure and
asks permission to proceed.
c. An interpreter explains the procedure to non-
English-speaking patients.
d. Parents give consent for procedures on their
child.
56. [LO 7.6] How much time without food or drink
is considered fasting?
a. 4 to 6 hours
b. 2 to 4 hours
c. 6 to 7 hours
d. 8 to 12 hours
a. Complete blood count
b. Triglycerides and other lipids
c. Therapeutic drug monitoring
d. Vitamin levels
60. [LO 7.6] A postprandial specimen collection
should occur
a. after a blood transfusion.
b. before the next dose of medication.
c. early in the morning.
d. at a specific time after eating.
61. [LO 7.6] What specimens are most likely to be
collected only early in the morning? (Choose all
that apply.)
a. Basal state
b. Diurnal analytes
c. Fasting
d. Postprandial
62. [LO 7.6] What specimens are most likely to
be collected for therapeutic drug monitoring?
(Choose all that apply.)
a. Fasting
b. Peak
c. Postprandial
d. Trough
57. [LO 7.6] Which of the following actions by the
patient will least likely affect fasting-level test
results?
a. Chewing sugarless gum
b. Drinking tea or coffee without sugar
c. Smoking cigarettes
d. Drinking water
Copyright © 2019 by McGraw-Hill Education
Enhance your learning by completing these exercises and more at
connect.mheducation.com.
Chapter Patient and Specimen Requirements

References
American Hospital Association. (2003). The patient care partnership. Chicago, IL: Author.
American Medical Association. (2013). HIPAA violations and enforcement. Retrieved July 20, 2013, from www.ama-assn.org/ama/
pub/physician-resources/solutions-managing-your-practice/coding-billing-insurance/hipaahealth-insurance-portabilityaccountability-act/hipaa-violations-enforcement.page
Burtis, C. A., Ashwood, E. R., & Bruns, D. E. (Eds.). (2005). Tietz textbook of clinical chemistry and molecular diagnostics (4th ed.).
Philadelphia, PA: Saunders.
Clinical and Laboratory Standards Institute. (2007). Procedures for the collection of diagnostic blood specimens by venipuncture;
approved standard (6th ed.). Wayne, PA: Author.
Clinical and Laboratory Standards Institute. (2010). Accuracy in patient and sample identification; approved guideline. Wayne, PA:
Author.
Clinical and Laboratory Standards Institute. (2010). Specimen label: Content and location, font and label orientation. Wayne, PA:
Author.
Healthcare Information and Management Systems. (2011). Electronic health records. Retrieved March 22, 2011, from www.himss
.org/ASP/topics_ehr.asp
Judson, K., & Harrison, C (2010). Law and ethics for medical careers (5th ed.). New York, NY: McGraw-Hill.
Saltin, B. (1996). Exercise and the environment: Focus on altitude. Research Quarterly for Exercise and Sport, 67(3): S1–S10.
Wilson, D. D. (2008). McGraw-Hill manual of laboratory and diagnostic tests. New York, NY: McGraw-Hill.
Design Elements: Law & Ethics icon (marble columns) ©Nice_Media/Shutterstock.com RF; Life Span Considerations icon (baby holding hand) ©Lerche&Johnson/
Shutterstock.com RF; Communicate & Connect icon (patient and doctor) ©Rocketclips, Inc RF/Shutterstock.com; Safety & Infection Control icon (samples in hand)
©motorolka/Shutterstock.com RF; Think It Through icon (staircase) ©Lightspring/Shutterstock.com RF.
Chapter Patient and Specimen Requirements
Copyright © 2019 by McGraw-Hill Education

8
Blood Collection Equipment
acid citrate dextrose (ACD)
additive
aerosol
aliquot
antiglycolytic
antiseptic
bacteriostatic
bevel
capillary action
citrate
clot activator
essential terms
dermal (capillary) puncture
ethylenediaminetetraacetic
acid (EDTA)
evacuated collection tube
evacuated tube holder
gauge
heel warmer
heparin
lancet
microcollection
sharps container
sterile
thixotropic
separator gel
tourniquet
venipuncture
winged infusion set
©Steve Allen/Getty Images RF
Learning Outcomes
. Identify equipment used for both
venipuncture and dermal (capillary) puncture.
. Identify equipment specific for venipuncture
procedures.
. Identify equipment specific for dermal
(capillary) puncture procedures.
. Identify the various types of additives and
color coding used in blood collection and
explain the reasons for their use.
. Implement the correct order of draw
for venipuncture and dermal (capillary)
puncture procedures.
. Compare blood collection equipment from
various manufacturers.
Related NAACLS Competencies
. Demonstrate knowledge of collection
equipment, various types of additives used, special
precautions necessary, and substances that can
interfere in clinical analysis of blood constituents.
. Identify the various types of additives used in
blood collection, and explain the reasons for their use.
. Identify the evacuated tube color codes
associated with the additives.
. Describe the proper order of draw for
specimen collections.
. Describe substances that can interfere in
clinical analysis of blood constituents and ways in
which the phlebotomist can help to avoid these
occurrences.
. List and select the types of equipment needed
to collect blood by venipuncture and capillary
(dermal) puncture.
. Identify special precautions necessary during
blood collections by venipuncture and capillary
(dermal) puncture.

Introduction
This chapter presents the various types of equipment used in the collection
of blood specimens. It also describes a commonly accepted sequence for collecting multiple specimens, as well as the tubes used for specimen collection
in the same order of draw. These items are fairly standard, but phlebotomists
must become familiar with the equipment used at their facilities and with any
facility modification to the order of draw.
.
Common Blood Collection
Equipment
For any blood test, collecting a blood specimen—by venipuncture (puncture of a
vein) or dermal (capillary) puncture (puncture of the skin)—is the first step. This
process is often referred to as “drawing blood.” The phlebotomist must become
familiar with each item used in the collection of blood by venipuncture and
dermal (capillary) puncture (Figure 8-1). Proper handling of phlebotomy equipment is of the utmost importance for the safety of both the phlebotomist and the
patient. Equipment used by the phlebotomist is universal but may vary in appearance depending on its manufacturer. Although much of the equipment is used
during both venipuncture and microcollection procedures (dermal [capillary]
puncture), there are some items that are used only for specific types of collection.
Table 8-1 lists each type of blood collection equipment and when it is used.
Phlebotomy Tray or Cart
Phlebotomists use a tray or cart to store and transport blood collection equipment (Figure 8-2). Trays and carts should be clean, orderly, and well stocked
with sufficient equipment for the number and types of tests ordered, as well
as the types of patient situations that may be encountered. A phlebotomist
should take the time to disinfect and restock the phlebotomy tray or cart as
needed on a regular basis.
Gloves
OSHA regulations require that gloves be worn during the phlebotomy procedure and changed after each patient. Nonsterile gloves are acceptable for blood
collection because, unlike surgery, blood collection is not a sterile procedure.
Figure - A variety of equipment is needed to perform
routine blood collection.
©McGraw-Hill Education/Sandra Mesrine, photographer
Gloves are used to prevent the spread of infection, but
pathogens are not completely eliminated as they would
be during a sterile procedure. Because the powder in
gloves can contaminate the specimen during blood
collection, powder-free gloves are recommended.
Gloves are available in a variety of materials and
in many sizes and styles. Nitrile, vitrile, synthetic
vinyl, or other nonlatex gloves are frequently used
(Figure 8-3). Although latex gloves were widely used
in the past, most healthcare facilities have discontinued stocking them to protect employees and patients
who may have latex allergies. Even when permitted
by the healthcare facility, latex gloves should not be
used when a patient has latex allergies.
Glove liners are available, but these are only for
long-term glove use, such as specimen processing.
Copyright © 2019 by McGraw-Hill Education
Chapter Blood Collection Equipment

TABLE Blood Collection Equipment
B
C
A
Routine
Equipment
Phlebotomy tray or cart Yes Yes Yes
Gloves Yes Yes Yes
Hand sanitizer Yes Yes Yes
Alcohol prep pads Yes Yes Yes
Gauze pads Yes Yes Yes
Adhesive bandage or tape Yes Yes Yes
Sharps (needle disposal) container Yes Ye s Yes
Permanent fine-tipped marking pen Yes Yes Yes
Labels (preprinted) Yes Yes Yes
Specimen transport bags Yes Yes Yes
Evacuated tube holder or syringe Yes Yes No
Evacuated tubes Yes Yes No
Tourniquet Yes Yes No
Needles Yes Yes No
Winged infusion set No Yes No
Syringe No Yes No
Venipuncture
Difficult
Venipuncture
Dermal (Capillary)
Puncture
Lancets No No Yes
Capillary tubes and sealant No No Yes
Microcollection tubes No No Yes
They can make it difficult to palpate veins during blood collection. Thus, wearing well-fitting, nonlatex gloves is the best policy for the phlebotomist.
Hand Sanitizers
Phlebotomists must wash their hands after removing their used gloves and
prior to donning new gloves for procedures with the next patient. If soap
and running water are not available, a suitable alcohol-based hand sanitizer
Figure - (A) Blood collection tray. (B) Some trays are available with covers that are used for storage and during transport
between departments. (C) Blood collection carts on wheels provide an ergonomic way for phlebotomists to transport all the
equipment they may need during blood collection rounds. Some include computers so that phlebotomists have continuous
access to the laboratory information system.
Copyright © 2019 by McGraw-Hill Education
A: ©McGraw-Hill Education/Sandra Mesrine, photographer; B: ©BSIP SA/Alamy Stock Photo; C: ©Lillian Mundt
Chapter Blood Collection Equipment

Figure - Several sizes and types of gloves.
©McGraw-Hill Education/Sandra Mesrine, photographer
may be used to cleanse hands between patients (Figure 8-4). However, if your
hands show any type of visible contamination or soilage, you should wash
your hands rather than use an alcohol-based hand sanitizer.
Alcohol Prep Pads
To prevent infection, the blood collection site must be cleaned using an
antiseptic—a germicidal solution—before the blood specimen is collected.
Alcohol prep pads are a frequently used type of antiseptic. These sterile pads are
saturated with 70% isopropyl alcohol (Figure 8-5). Seventy percent isopropyl
alcohol is a bacteriostatic antiseptic, meaning that it inhibits the growth of
bacteria. This prevents contamination by normal skin bacteria during a venipuncture procedure.
Not all blood collection sites are cleaned using alcohol. Stronger antiseptics
may be used depending on the site or collection procedure. A blood culture
collection or an arterial puncture requires additional sterility. For these procedures, antiseptics such as Betadine®, iodine, or chlorhexidine gluconate are
Figure - Alcohol-based hand sanitizer.
©Lillian Mundt
used to clean the puncture site. Collection sites for
blood alcohol levels are not cleaned with alcohol prep
pads due to possible contamination. Another type of
antiseptic is used based on facility policy.
Figure - Alcohol prep pads.
©McGraw-Hill Education/Sandra Mesrine, photographer
Chapter Blood Collection Equipment
Gauze Pads
Gauze is a loosely woven cotton fabric used to cover
the puncture site when applying pressure immediately upon completion of the procedure. Gauze pads
are available in several sizes, including the 2-inch by
2-inch squares normally used after a blood collection procedure (Figure 8-6). If needed, gauze can be
folded into quarters and taped to the patient’s skin to
serve as a pressure bandage, which will maintain a
firm amount of pressure to the site. Note that cotton
balls are not recommended for postprocedure care of
Copyright © 2019 by McGraw-Hill Education

a blood collection site because the cotton may adhere
BA
to the site and cause the site to reopen when the cotton ball is removed.
Adhesive Bandages
An adhesive bandage or gauze held by paper tape is
placed over the puncture site to stop the bleeding.
Adhesive bandages should not be used on patients
with fragile skin, such as elderly patients. In some
facilities, paper tape may be used on patients with
fragile skin. However, applying bandages of any
type is not advisable for infants and small children
because they may remove and place the bandage
in their mouth and possibly aspirate and choke on
it. You may ask the patient to hold pressure on the
gauze while you are finishing the collection procedure.
However, it is your responsibility to ensure that bleeding
has stopped before releasing the patient. Advise the
patient to watch the site and
remove the bandage in 15 to
30 minutes.
In many cases a roller
gauze is wrapped entirely
around the arm, so tape
is not placed on the skin.
A Coban® bandage can also
be used to apply pressure
(Figure 8-7). Acute care facilities may not use Coban®
Figure - (A) Roller gauze dressing. (B) Coban® bandage.
©Total Care Programming, Inc.
because certain patients may
be unable to remove the bandage after 15 to 20 minutes. Leaving a Coban® or
other pressure dressing in place too long can cause constriction of the tissues
and possible circulation issues. The patient should also be instructed to
avoid lifting and frequent bending of the elbow to prevent the return
of bleeding. Select a bandage size appropriate to the type of puncture
performed and the patient’s situation (Figure 8-8).
Figure - Gauze pads.
©McGraw-Hill Education/Sandra Mesrine, photographer
Sharps Container
Needle disposal containers, also known as sharps containers, are
designed to protect healthcare personnel from accidental needlesticks
by contaminated needles (Figure 8-9). Sharps containers are rigid,
leakproof, puncture resistant, and clearly marked with the biohazard
symbol. These containers are usually red and are available in a variety of shapes and sizes. Used needles, lancets, and other sharp items
must be disposed of immediately in these special containers. To prevent possible needlesticks, the needle should not be removed from the
holder. Dispose of the needle holder in the sharps container as well.
Never reach into, tamper with, or attempt to pry open a sealed sharps
container. These disposal units are marked with a biohazard label and
are to be disposed of according to the biohazard guidelines established
Copyright © 2019 by McGraw-Hill Education
by OSHA.
Figure - A variety of adhesive
bandages.
©Lillian Mundt
Chapter Blood Collection Equipment

Figure - Biohazard sharps containers.
A Tabletop B Wall-mounted
©Total Care Programming, Inc.
Figure - Heel warmer.
©McGraw-Hill Education/Sandra Mesrine, photographer
computer-generated label or with a permanent marker or pen. A computergenerated label usually includes a bar code that provides specimen information to laboratory information systems within the EHR ( Figure 8-11). Place the
computer-generated label over the original tube label, not over the clear area of
the tube. This will allow the amount and condition of the blood to be viewed
Tissue Warmers
Tissue warmers, such as a warm towel, cloth, or
chemical warmer packet, are used to increase the
blood flow to the intended puncture site. A heel
warmer packet (Figure 8-10) is commonly used for
dermal (capillary) puncture on infants. Larger tissue
warmers are used on adults during venipuncture.
Prewarming the intended venipuncture site will help
when locating a vein especially with obese, elderly,
and oncology (cancer) patients.
Computer Label/Permanent
Marking Pen
Each evacuated tube must be labeled at the time of
specimen collection, immediately after drawing each
patient’s blood. Tubes must be labeled before the phlebotomist leaves the patient’s side but never before
the specimen is drawn. Tubes may be labeled with a
Figure - Computer labels.
©Lillian Mundt
Chapter Blood Collection Equipment
Copyright © 2019 by McGraw-Hill Education

during testing. Any label, whether computer generated or handwritten, should contain the patient’s full name, a unique patient identifier,
the patient’s date of birth, the specimen collection time and date, and
the collector’s identification (initials, signature, or code).
When using a computer label, the phlebotomist must initial and add
the date and time to the label, being careful not to write over the bar
code, and affix it to the tube after collection. If computer labels are
not provided, the same required patient identification information and
collection information must be written on specimen labels of all tubes
collected. Specimens for the blood bank (such as type and cross-match)
may have other special requirements, including patient banding procedures. Identification of specimens for the blood bank’s transfusion
service is explained in the chapter Special Phlebotomy Procedures.
Specimen Transport Bags
Specimen transport bags are plastic, ziplocked bags that display a biohazard symbol and include a separate outer pocket in which paperwork is placed (Figure 8-12). These bags not only identify the contents
as being a biohazard but also help contain specimen spills if the collection container breaks. A specimen bag must be used to transport
blood from the collection location to the testing location. The specific
type of transport bag varies, depending on your place of employment. For transport between facilities, adding an absorbent pad in the specimen containment
portion of the transport bag will provide extra safety from spills and breakage.
The specimen bag protects the person handling the specimens from
biohazard exposure. Blood and other laboratory specimens may contain
disease-producing organisms, and preventing exposure is part of standard
precautions. Once you place a specimen in the bag, handle it gently and keep
it vertical, with the tube cap or closure on top. For blood specimens, this will
prevent hemolysis (destruction of red blood cells) caused by excessive agitation.
Figure - Specimen transport bags
(biohazard bags).
©Lillian Mundt
1. What is the purpose of alcohol prep pads in blood collection procedures?
2. What items should be placed in a sharps container?
3. What type of gloves should be worn during a phlebotomy procedure?
4. When should a hand sanitizer not be used for hand hygiene?
5. What information must be included on the label of a specimen tube?
.
Equipment Unique to Venipuncture
Blood collection involving various venipuncture procedures requires equipment designed specifically for these procedures. This section describes the
equipment used in venipuncture procedures. The actual procedures are discussed in the chapter Venipuncture.
Tourniquets
A tourniquet is a length of rubber tubing or strapping that is wrapped around
the arm to slow the flow of venous blood (blood in the veins), causing a backup
of blood and increased pressure. Tourniquets are used during venipuncture to
make it easier to locate a patient’s veins. A tourniquet is applied 3 to 4 inches
Copyright © 2019 by McGraw-Hill Education
above the puncture site, tightly enough to slow the blood flow but not stop it.
Checkpoint
Questions .
Chapter Blood Collection Equipment
Соседние файлы в папке Библиотека им академика М.И. Перельмана
