Venipuncture Flashcards
1
Q
What is the medical procedure used to obtain a blood sample for diagnostic therapeutic or monitoring purposes?
A
Blood Extraction (Venipuncture)
2
Q
What is performed if more than 1 mL of blood is required for a laboratory test?
A
Blood Extraction
3
Q
What is the purpose of blood extraction that involves assessing a patient’s overall health and detecting health issues?
A
Diagnostic Purposes
4
Q
What type of test evaluates red blood cells. white blood cells. and platelets to detect conditions like anemia. infection. or blood disorders?
A
Complete Blood Count
5
Q
What type of test assesses organ function and measures levels of glucose. electrolytes. lipids. and enzymes?
A
Blood Chemistry Tests
6
Q
What type of test detects infections such as HIV. hepatitis. and other diseases that require blood screening?
A
Infectious Disease Testing
7
Q
What type of study assesses blood clotting function. especially in patients on anticoagulation therapy?
A
Coagulation Studies
8
Q
What is the purpose of blood extraction that involves tracking the progression of chronic diseases?
A
Monitoring Health Conditions
9
Q
What chronic disease requires blood extraction to measure glucose levels and assess insulin therapy effectiveness?
A
Diabetes
10
Q
What disease requires blood extraction to evaluate kidney function by measuring creatinine and blood urea nitrogen?
A
Chronic Kidney Disease
11
Q
What condition is monitored using lipid panels and troponin levels to assess heart health?
A
Cardiovascular Disease
12
Q
What is the purpose of blood extraction that involves donating blood components like plasma or platelets?
A
Therapeutic Purposes
13
Q
What medical procedure is performed in conditions like polycythemia or hemochromatosis to reduce excess blood volume or iron levels?
A
Bloodletting
14
Q
What is the purpose of blood extraction that ensures medications remain within a therapeutic range?
A
Medication Monitoring
15
Q
What process ensures drug levels. such as antibiotics or anti-seizure medications. remain within safe and effective ranges?
A
Therapeutic Drug Monitoring
16
Q
What monitoring process involves drawing blood to check International Normalized Ratio levels in patients on anticoagulants?
A
Warfarin Therapy Monitoring
17
Q
What is the purpose of blood extraction that is needed for urgent transfusions in trauma or surgical cases?
A
Emergency Situations
18
Q
What emergency procedure involves rapid blood extraction to determine blood type and crossmatch for transfusions?
A
Blood Transfusion
19
Q
What test helps identify pathogens in sepsis or other severe infections?
A
Acute Infections Testing
20
Q
What type of screening is performed to detect drugs. poisons. or toxins in the bloodstream?
A
Toxicology Screening
21
Q
What is the purpose of blood extraction that ensures a patient’s safety before a surgical procedure?
A
Preoperative Testing
22
Q
What preoperative test determines a patient’s blood type in case a transfusion is needed during surgery?
A
Blood Typing
23
Q
What preoperative test assesses a patient’s risk of bleeding during surgery?
A
Clotting Profile
24
Q
What preoperative test ensures a patient is not carrying infectious agents that could affect surgery or recovery?
A
Infection Screen
25
What is the purpose of blood extraction that contributes to scientific studies. disease research. and treatment development?
Research Purposes
26
What is the use of blood extraction in studying diseases. testing new medications. and evaluating biomarkers?
Clinical Research
27
What type of research uses blood samples to investigate new diagnostic markers for diseases?
Investigating Diagnostic Markers
28
What type of research uses blood extraction to test the effectiveness of new medications or treatments?
Testing New Medications
29
What type of research uses blood samples to study genetic predispositions or biomarkers for conditions like cancer and diabetes?
Genetic Predisposition Research
30
What is the purpose of blood extraction that assesses a patient’s response to various interventions and treatments?
Patient Evaluation and Health Management
31
What type of test is used to monitor deficiencies or excesses in vitamin D. B12. or iron?
Vitamin and Mineral Levels Testing
32
What type of blood test evaluates hormone levels such as thyroid hormones. cortisol. and insulin?
Endocrine Function Testing
33
What vital procedure in medical practice enables accurate diagnosis. efficient monitoring of health conditions. and effective management of interventions?
Blood Extraction or Venipuncture
34
What blood components can be donated for transfusions or medical treatments?
Plasma and Platelets
35
What condition requires bloodletting to reduce excess red blood cells?
Polycythemia
36
What condition requires bloodletting to remove excess iron from the bloodstream?
Hemochromatosis
37
What laboratory test is performed to evaluate liver. kidney. and heart function?
Blood Chemistry Tests
38
What blood test is used to monitor lipid levels and assess cardiovascular risk?
Lipid Panel
39
What blood component is primarily responsible for oxygen transport in the body?
Red Blood Cells
40
What blood component plays a crucial role in immune defense?
White Blood Cells
41
What blood component is essential for clot formation?
Platelets
42
What is the normal function of the kidney that is evaluated through blood extraction?
Filtration of waste
43
What blood test measures the amount of creatinine and blood urea nitrogen to assess kidney function?
Renal Function Test
44
What medical treatment requires routine blood extraction to measure therapeutic drug levels?
Antibiotic Therapy. Anti-seizure Therapy. and Immunosuppressant Therapy
45
What is the primary reason for performing blood typing before a transfusion?
To ensure compatibility and prevent transfusion reactions
46
What is the main goal of toxicology screening?
To detect drugs. poisons. toxins in the bloodstream
47
What condition requires frequent INR monitoring to adjust anticoagulation therapy?
Warfarin Therapy and Anticoagulation Therapy
48
What is the process of removing a blood sample using a needle and syringe or a vacuum tube system?
Venipuncture
49
What type of hormone levels can be assessed through blood extraction for endocrine evaluation?
Thyroid Hormones. Cortisol. and Insulin
50
What type of health assessment is done by measuring blood levels of vitamins and minerals?
Vitamin and Mineral Testing
51
What is the venipuncture method that allows the primary collection of a blood sample after puncture?
Single Collection
52
What is the venipuncture method that allows the collection of more than one blood tube that may be anticoagulated or non-anticoagulated?
Multiple Collection
53
What venipuncture technique uses a syringe with an attached needle?
Syringe Method
54
What venipuncture technique uses a butterfly needle set that can be attached to a syringe?
Butterfly Method
55
What venipuncture method is also known as the Vacutainer Method?
Evacuated Tube System
56
What venipuncture method uses a two-way needle. needle adaptor. and an evacuated tube that may be anticoagulated or non-anticoagulated?
Evacuated Tube System
57
What venipuncture method provides a technically sterile and closed system of blood extraction?
Evacuated Tube System
58
What are the purposes of blood extraction?
- Diagnostic Purposes.
- Monitoring Health Conditions.
- Therapeutic Purposes.
- Medication Monitoring.
- Emergency Situations.
- Preoperative Testing.
- Research Purposes.
- Patient Evaluation and Health Management
59
What are the types of diagnostic blood tests?
- Complete Blood Count (CBC).
- Blood Chemistry Tests.
- Infectious Disease Testing.
- Coagulation Studies
60
What chronic conditions require blood extraction for monitoring?
- Diabetes.
- Chronic Kidney Disease.
- Cardiovascular Disease
61
What are the therapeutic purposes of blood extraction?
- Plasma or Platelet Donation.
- Bloodletting
62
What are the purposes of medication monitoring through blood extraction?
- Therapeutic Drug Monitoring (TDM).
- Warfarin Therapy Monitoring
63
What are the emergency situations that require blood extraction?
- Blood Transfusion.
- Acute Infections Testing.
- Toxicology Screening
64
What preoperative tests require blood extraction?
- Blood Typing.
- Clotting Profile.
- Infection Screen
65
What are the uses of blood extraction in research?
- Investigating Diagnostic Markers.
- Testing New Medications.
- Studying Genetic Predispositions
66
What are the aspects of patient evaluation and health management that require blood extraction?
- Vitamin and Mineral Levels Testing.
- Endocrine Function Testing
67
What are the methods of venipuncture?
- Single Collection.
- Multiple Collection
68
What are the techniques under the single collection method of venipuncture?
- Syringe Method.
- Butterfly Method
69
What are the techniques under the multiple collection method of venipuncture?
Evacuated Tube System (Vacutainer Method)
70
What are the materials used in the Evacuated Tube System (Vacutainer Method)?
- Two-way Needle.
- Needle Adaptor.
- Evacuated Tube (Anticoagulated or Non-Anticoagulated)
71
What venipuncture method is commonly used when smaller blood volumes are needed or when there is a risk of vein collapse or hemolysis?
Syringe Method
72
What venipuncture method provides greater control over blood flow during collection?
Syringe Method
73
What venipuncture method is ideal for difficult or small veins such as those in pediatric or geriatric patients?
syringe method
74
What venipuncture method allows for more accurate blood sample collection and monitoring of the amount drawn?
Syringe Method
75
What venipuncture method reduces the risk of hemolysis by allowing slow and steady aspiration of blood?
Syringe Method
76
What venipuncture method allows for flexibility in collecting blood for multiple tests without overfilling or underfilling sample containers?
Syringe Method
77
What venipuncture method allows easier adjustment of the needle position if the vein was not fully accessed on the first attempt?
Syringe Method
78
What venipuncture method is useful for drawing blood from hard-to-reach sites such as the hand or antecubital fossa?
Syringe Method
79
What are the common indications for using the syringe method of venipuncture?
- Pediatric Venipuncture.
- Patients with difficult veins or a history of collapsed veins.
- When only a small volume of blood is needed.
- When the risk of hemolysis is high
80
What are the advantages of the syringe method of venipuncture?
- Controlled Collection.
- Reduced Hemolysis Risk.
- Smaller Volumes
81
What are the disadvantages of the syringe method of venipuncture?
- Technique Sensitivity.
- Not Suitable for Large Volume Draws
82
What is the venipuncture method that involves using a syringe to draw blood?
Syringe Method
83
What is the primary advantage of the syringe method in controlling blood flow?
It allows manual adjustment of suction for a steady and controlled flow of blood
84
What is the benefit of using the syringe method for patients with small or fragile veins?
It provides gentle suction
85
What is the importance of the syringe method in blood sample accuracy?
It allows the practitioner to monitor the blood volume drawn
86
How does the syringe method help reduce the risk of hemolysis?
It allows slow and steady blood aspiration
87
Why is the syringe method preferred for pediatric and geriatric patients?
It provides better control
88
Why is the syringe method beneficial for multiple blood tests?
It allows for controlled blood collection
89
What is an advantage of using a syringe when adjusting needle position?
It allows re-aspiration or gentle needle adjustments without requiring multiple venipuncture attempts
90
In what cases is the syringe method particularly useful for blood collection?
When drawing blood from hard-to-reach veins such as in the hand
91
What is the significance of controlled collection in the syringe method?
It ensures precise blood withdrawal
92
What are the common clinical scenarios where the syringe method is preferred?
- Small blood volume collection.
- Pediatric venipuncture.
- Patients with difficult veins.
- High risk of hemolysis
93
What is a disadvantage of the syringe method regarding skill requirements?
It requires steady hands and proper technique to avoid complications like hematoma or incomplete sample collection
94
Why is the syringe method not ideal for large-volume blood draws?
It is slower and requires manual aspiration
95
What patient populations benefit the most from the syringe method due to vein fragility?
Pediatric patients and geriatric patients
96
What is one risk of improper syringe method technique?
Hematoma formation due to excessive suction or incorrect needle positioning
97
Why is the syringe method helpful in cases of difficult or collapsed veins?
It allows careful and controlled blood aspiration
98
How does the syringe method benefit patients with clotting disorders?
It reduces the risk of hemolysis
99
What is the main reason healthcare professionals use the syringe method instead of vacuum tubes?
To avoid excessive suction pressure that may damage fragile veins or blood cells
100
What is one limitation of the syringe method compared to evacuated tube collection?
It requires manual transfer of blood into collection tubes
101
Why does the syringe method provide flexibility in blood collection?
It allows incremental collection
102
What factor makes the syringe method more controlled than other blood extraction techniques?
The practitioner manually controls the plunger to regulate blood flow
103
What is one safety concern with the syringe method when handling blood samples?
Risk of needle-stick injuries during blood transfer to tubes
104
What makes the syringe method beneficial in situations where veins are at difficult angles?
It allows precise control of blood draw and needle placement
105
Why is the syringe method considered a valuable technique in venipuncture?
It provides better control over blood collection
106
What is the widely used method in clinical laboratories for blood collection due to its safety. efficiency. and accuracy?
Evacuated Tube System (ETS)
107
What type of tubes does the ETS use to ensure a specific blood volume is collected?
Pre-measured vacuum-sealed tubes
108
How does ETS eliminate the need for manual blood collection techniques?
By using vacuum-sealed tubes that automatically draw a set amount of blood
109
What is the primary safety advantage of using ETS for venipuncture?
It reduces contamination and exposure to bloodborne pathogens
110
How does ETS ensure consistency in blood sample collection?
The vacuum mechanism ensures a uniform volume of blood is drawn each time
111
What labeling system in ETS helps prevent errors in additive selection?
Pre-labeled
112
How does ETS minimize the risk of hemolysis compared to other methods?
By drawing blood under controlled vacuum pressure
113
What is a key advantage of ETS in handling and organizing blood samples?
Pre-labeled tubes simplify organization and reduce handling errors
114
Why is ETS considered safer for healthcare workers compared to open-system methods?
It reduces accidental needle-stick injuries by using a closed system
115
What mechanism in ETS ensures that blood is collected precisely and accurately?
Vacuum-sealed tubes automatically drawing a set volume of blood
116
How does ETS contribute to standardization in laboratory blood testing?
Each tube is pre-labeled with specific additives
117
Why is ETS preferred for collecting multiple blood samples efficiently?
Multiple tubes can be filled in sequence without needing separate punctures
118
What factor in ETS reduces the risk of blood exposure to the environment?
The closed system prevents direct contact with blood
119
How does ETS improve patient safety during venipuncture?
Minimizes contamination
120
What is one major reason why ETS is preferred over syringe-based methods in clinical settings?
It allows for quicker and more standardized blood collection
121
What feature of ETS improves test reliability by ensuring blood integrity?
Controlled vacuum pressure minimizes hemolysis
122
What component of ETS allows for the safe transfer of blood from the needle into the collection tube?
Needle adaptor
123
What risk is significantly reduced for healthcare workers using ETS compared to other venipuncture methods?
Accidental needle sticks
124
What is the role of the vacuum inside ETS tubes?
It draws blood into the tube automatically once the needle punctures the vein
125
Enumerate the primary advantages of the Evacuated Tube System.
- Consistency.
- Convenience.
- Reduced risk of injury.
- Improved safety.
- Standardized blood collection.
- Reduced hemolysis risk
126
Enumerate the ways ETS ensures efficient blood collection.
- Pre-measured vacuum-sealed tubes.
- Eliminates manual blood collection.
- Provides precise blood volume.
- Allows for quick multiple-sample collection
127
Enumerate the safety benefits of using ETS.
- Minimizes contamination.
- Reduces bloodborne pathogen exposure.
- Prevents accidental needle sticks.
- Uses a closed system.
- Reduces environmental exposure to blood
128
Enumerate the reasons ETS prevents hemolysis.
- Controlled vacuum pressure.
- Reduced manual handling.
- Closed collection system.
- Prevents excessive suction force on red blood cells
129
Enumerate the factors that make ETS more convenient than other blood collection methods.
- Pre-labeled tubes.
- Standardized additive use.
- Faster collection process.
- Ability to collect multiple samples at once
130
What three components make up the Evacuated Tube System (ETS)?
- Needle
- evacuated collection tube
- holder
131
What is the primary purpose of the evacuated (vacuum) tube in ETS?
To automatically draw blood without manual suction
132
What are the key steps of venipuncture using the ETS?
- Preparation.
- application of tourniquet.
- selection of venipuncture site.
- insertion of needle.
- blood collection.
- completion of collection.
- post-procedure
133
What is the first step in the ETS venipuncture process?
Preparation
134
What equipment is needed for ETS venipuncture?
- Gloves
- antiseptic wipes,
- tourniquet,
- evacuated tubes,
- needle with holder
135
Why is sterile technique essential in ETS venipuncture?
To prevent contamination and ensure patient safety
136
What is the purpose of applying a tourniquet before venipuncture?
To fill veins with blood and make them more visible and accessible
137
Where is the preferred site for venipuncture using ETS?
Antecubital fossa
138
What is the most commonly used vein in ETS venipuncture?
Median cubital vein
139
What happens once the needle is correctly positioned in the vein?
The pre-prepared evacuated tube is attached to the needle holder
140
What mechanism allows blood to enter the evacuated tube?
The vacuum inside the tube draws blood through the needle
141
Why are different colored tubes used in ETS blood collection?
They contain different additives for specific laboratory tests
142
What are examples of additives in evacuated tubes?
Anticoagulants. clot activators. preservatives
143
Why must blood collection tubes be gently mixed after collection?
To properly incorporate additives with the blood sample
144
What happens after the required amount of blood is collected?
The needle is removed and pressure is applied to the puncture site
145
How is the puncture site managed after venipuncture?
It is cleaned. bandaged. and monitored for bleeding
146
What is the final step of ETS venipuncture?
The blood sample is labeled and transported to the laboratory for analysis
147
Enumerate the key steps in venipuncture using the Evacuated Tube System.
- Preparation.
- Application of tourniquet.
- Selection of venipuncture site.
- Insertion of needle.
- Blood collection.
- Completion of collection.
- Post-procedure
148
Enumerate the necessary equipment for ETS venipuncture.
- Gloves. Antiseptic wipes.
-Tourniquet.
- Evacuated tubes.
- Needle with holder
149
Enumerate the functions of a tourniquet in venipuncture.
- Fills veins with blood.
- Makes veins more visible.
- Facilitates easier needle insertion
150
Enumerate the reasons why the median cubital vein is preferred for ETS venipuncture.
- Easily accessible.
- Large size.
- Lower risk of complications
151
Enumerate the reasons why different colored tubes are used in ETS.
- Different additives.
- Prevent clotting.
- Preserve blood components.
- Ensure test accuracy
152
Enumerate the steps taken after blood collection is completed.
- Needle removal.
- Pressure application.
- Gentle mixing of tube.
- Cleaning and bandaging the site.
- Labeling and transporting the sample
153
What are the three main categories of venipuncture complications?
- Immediate
- local
- delayed
154
What is the most common immediate complication of venipuncture?
Pain or discomfort
155
What causes pain or discomfort during venipuncture?
Needle insertion and local irritation
156
What can cause hemorrhage or excessive bleeding after venipuncture?
Vein damage and lack of pressure application
157
What serious issue can result from an accidental arterial puncture?
- Significant bleeding
- hematoma formation
- arterial injury
158
What is the vasovagal response in venipuncture?
A sudden drop in blood pressure leading to fainting or dizziness
159
What are common symptoms of a vasovagal response?
- Nausea
- sweating
- temporary loss of consciousness
160
How can an infection occur as an immediate complication of venipuncture?
- Improper skin cleansing
- use of non-sterile needles
161
Who is at higher risk of infection following venipuncture?
Immunocompromised individuals
162
What is a hematoma in venipuncture?
Blood collection under the skin due to vein damage
163
What are the visible signs of a hematoma?
- Swelling.
- bruising at the puncture site
164
What is phlebitis in venipuncture?
Inflammation of the vein
165
What symptoms indicate phlebitis?
- Redness.
- pain.
- swelling along the vein
166
What type of venous access increases the risk of phlebitis?
Intravenous catheter use
167
What is a rare but serious local complication of venipuncture?
Nerve injury
168
What symptoms can nerve injury cause?
- Numbness.
- tingling.
- pain
169
How does cellulitis develop as a delayed complication of venipuncture?
Bacterial infection at the puncture site
170
What medical treatments are needed for abscesses or cellulitis?
Antibiotics. drainage
171
What is deep vein thrombosis (DVT) in the context of venipuncture?
A blood clot in deeper veins following venipuncture
172
What are the potential dangers of DVT?
- Swelling.
- pain.
- risk of pulmonary embolism
173
What happens when a pulmonary embolism occurs?
A blood clot travels to the lungs
174
How does venipuncture lead to scarring or sclerotherapy?
Trauma to the vein causing fibrosis or hardening
175
What long-term effect can scarring of veins have on future blood draws?
Veins become difficult to access
176
What is post-venipuncture syndrome?
- Prolonged pain. discomfort. or numbness after venipuncture
177
What could be a possible cause of post-venipuncture syndrome?
Mild nerve injury or irritation
178
What is another name for the Butterfly Needle Method?
Winged infusion set method
179
What is the primary purpose of the Butterfly Needle Method?
Minimizing discomfort while drawing blood especially in difficult veins
180
What type of needle is used in this method?
A butterfly needle
181
What makes the butterfly needle more suitable for difficult veins?
Its smaller gauge shallow insertion angle and flexible tubing
182
What patients benefit most from the Butterfly Needle Method?
Pediatric patients elderly patients and individuals with small or fragile veins
183
Why is the butterfly needle ideal for collecting small volumes of blood?
It allows precise control minimizing trauma to the vein
184
How does the butterfly needle reduce patient anxiety?
It is smaller less intimidating and more comfortable
185
What are superficial veins and why is the butterfly needle used for them?
Small veins near the skin surface the butterfly needle allows controlled insertion
186
How does the winged design improve venipuncture?
Provides a better grip and more precise needle control
187
What advantage does the shallow insertion angle provide?
Increases accuracy and reduces vein trauma
188
How does the butterfly needle reduce the risk of hematomas?
Allows precise placement and control reducing vein puncture errors
189
What is hemolysis and how can butterfly needles help prevent it?
Destruction of red blood cells butterfly needles reduce suction pressure lowering the risk
190
Why are butterfly needles useful in IV therapy?
They can administer fluids or medications directly into the vein
191
What is the primary cost-related disadvantage of butterfly needles?
They are more expensive than regular straight needles
192
How does the smaller gauge affect blood collection efficiency?
Slower blood flow making it less ideal for large volume draws
193
Why are butterfly needles not suitable for long-term use?
Leaving them in the vein can increase vein damage risk
194
What is a potential issue with the short needle design?
It can be easily dislodged requiring a repeat puncture
195
What types of butterfly needles have built-in safety mechanisms?
Butterfly needles with safety features
196
What is the function of a closed-system butterfly needle?
Prevents air entry used for sterile blood cultures
197
What routine blood tests can use the butterfly needle method?
Complete Blood Count CBC blood glucose tests lipid panels
198
Why are butterfly needles preferred for blood cultures?
They help maintain sterile collection conditions
199
How does obesity affect venous access and why is a butterfly needle helpful?
Deeper veins are harder to access butterfly needles allow precise vein targeting
200
Enumerate the primary reasons for using the Butterfly Needle Method.
- Difficult veins
- small blood volume collection
- patient anxiety
- superficial vein access
201
Enumerate the advantages of the Butterfly Needle Method.
- Precision and control
- comfort
- small blood volume collection
- reduced hemolysis
- lower hematoma risk
- reduced vein trauma
- ideal for difficult veins
- versatility
202
Enumerate the disadvantages of the Butterfly Needle Method.
- Higher cost
- slower blood flow
- limited use for large volume draws
- risk of vein damage
- potential displacement
- not for long term
- IV therapy hemolysis risk if performed incorrectly
203
Enumerate the types of butterfly needles.
- Standard butterfly needles
- closed system butterfly needles
- butterfly needles with safety features
204
Enumerate the common uses of butterfly needles.
- Routine blood tests
- blood cultures
- pediatric or geriatric blood collection
- difficult venous access
205
What is the first step in the butterfly needle venipuncture process?
Preparing the equipment
206
What equipment is needed for the butterfly needle method?
Butterfly needle collection tubes alcohol swabs gloves and other necessary items
207
What are common vein sites for butterfly needle insertion?
Antecubital fossa back of the hand or other accessible veins
208
Why should the puncture site be allowed to dry after disinfecting?
To reduce discomfort and prevent infection
209
What is the typical insertion angle for a butterfly needle?
15–30 degrees depending on the vein depth and location
210
How is the butterfly needle held in place during insertion?
By securing the needle wings for stability
211
How does blood flow into the collection tube using a butterfly needle?
It flows through the tubing attached to the needle
212
What should be done after the correct amount of blood is collected?
Remove the needle and apply pressure with clean gauze
213
Where should a used butterfly needle be disposed of?
In a sharps container
214
Why is immediate disposal of the needle important?
To prevent needlestick injuries
215
What should be monitored post-procedure?
Signs of complications such as bleeding bruising or infection
216
What should the patient do after the procedure if bleeding persists?
Apply gentle pressure to the puncture site
217
What is a common complication of venipuncture even with a butterfly needle?
Bruising or hematoma formation
218
How can infection occur after a butterfly needle procedure?
If aseptic technique is not properly followed
219
What is a risk if the butterfly needle is inserted improperly?
Vessel damage or puncture of surrounding structures
220
Why is the butterfly needle method beneficial for difficult venous access patients?
It allows for precise control and minimizes discomfort
221
Why is the butterfly needle not ideal for large blood volume collections?
The smaller needle size results in slower blood flow
