تويت
50 سؤال وجواب في الدمويات
بسم الله الرحمن الرحيم
أخواني أعضاء منتديات العرب الكرام :sm188:
أخواني أعضاء منتديات العرب الكرام :sm188:
في هذا الموضوع نقدم مجموعة من الاسئلة المهمة في علم الدمويات
حيث نقدم السؤال ويليه الاجابة مباشرة دون اختيارات :
حيث نقدم السؤال ويليه الاجابة مباشرة دون اختيارات :
تم بعون الله التعديل
بالنسبه الى كلمه طالعه فيها ستارز وهي تعني (ميتا) ميلوسايت
ولكن لاسباب امنيه تم حظر الاربعه الاحرف
بالنسبه الى كلمه طالعه فيها ستارز وهي تعني (ميتا) ميلوسايت
ولكن لاسباب امنيه تم حظر الاربعه الاحرف
the method of hemoglobin measuerement requires the conversion of hemoglobin to
--- cyanmethemoglobin ---
which of the following will result in afalsely decreased erythrocyte sedimmentation rate
---
presence of codocytes
---
presence of codocytes
the " rule of three means that theHCT is
three times the HB
three times the HB
After staining aperipheral blood smear with wright'stain and a buffer with correct pH the RBC's appear pale pink and the WBC's stian very weakly with little - to- no nuclear deatail One possible explanation is
There was excessive washing of the smear .
Which of the following conditions would introduce a source of error into amanual WBC count
-- -Uneven distribution of leukocytes in the counting chamber
False positive results may occur in the screening solubility test for
hemoglobin S due to
hemoglobin S due to
- adding more blood to the reagent than called for by test procedure .
An increase in ****myelocytes , myelocytes , and promyelocytes in the peripheral blood can be referred to as ?
a shift to the left
While performing a WBC differentia count on a capillary blood smear ,no platelets were observed . What action should be taken ?
--- Look at the edge of the smear for platlet clumping
.
A falsely elevated hematocrit is obtained on adefective centrifuge . Which of the following values will not be affected ?
.
A falsely elevated hematocrit is obtained on adefective centrifuge . Which of the following values will not be affected ?
MCH
What effect would the use of abuffer with a PH of 6.0 have on a Wright stained smear ?
--- RBC's would be too pink .
Which of the following red - cell inclusions can be detected with a supravital perparation that uses new methylene -blue Nas the dye reagent but are not visible with Romanowsky stain
--- Heinz bodies
Which of the following contain RNA and are usually identified by staining with brilliant cresyl blue or new methylene blue
--- Reticulocytes .
Astudent cosistently makes peripheral blood smears that are too thin . you instruct the student to try :
--- increasing the angle of the spreader slide
which characteristic differentiates
the myelocyte from other myelocytic cells
--- Appearance of specific granules
the myelocyte from other myelocytic cells
--- Appearance of specific granules
vigorous mixing of a whole -blood specimen collected with EDTA results in
a falsely decreased hematocrit---
During the examination of a
cerebrospinal- apecimen from a 45- years old man . the clinical laboratory techinican noted the presence of rare choroid plexus cells in a total WBC count . these results are indictive of ?
cerebrospinal- apecimen from a 45- years old man . the clinical laboratory techinican noted the presence of rare choroid plexus cells in a total WBC count . these results are indictive of ?
--- normal state .
Blood collected for anticoagulation testing should be collected in
--- 3.2% sodium citrate with a 9:1 blood to anticoagulant ratio
ALL of the following conditions may cause an increased thrombin time except?
--- decreased prothrombin
The APTT is a screening test for all
coagulation factors in the intrinsic pathway except which of the following ?
coagulation factors in the intrinsic pathway except which of the following ?
--- X111
the coagulation factor that is decreased in hemophilia A is factor
--- V111
Thawing of platelet - poor plasma that has been stored at -- 40C for coagulation studies should be
performed at what temperature -
performed at what temperature -
- C38- C35
Which two plasma coagulation factors are the least stable in vitro
--- V and V111
A clinical laboratory techncian notes that aspecimen for an APTT has been stored at room temperature for five hours prior to testing . the CLT should :
--- request anew sample .
Plasma is diluted in afibrinogen activity determination to decrease the
--- influence of inhibitors
--- influence of inhibitors
WHich of the following is appropriate
in preparing an EDTA anticoagulated specimen for analysis when it has been standing in arack and not on a mechanical rotator ?
in preparing an EDTA anticoagulated specimen for analysis when it has been standing in arack and not on a mechanical rotator ?
--- Invert gently at least 60 times .
A patient has an RBC count of 2.70 *10
"12 /L ahemoglobin of 5.5 g/dl , and ahematocrit of 0.19 L/L . what erythrocyte morphology would you expect to see on the periphal blood smear ?
"12 /L ahemoglobin of 5.5 g/dl , and ahematocrit of 0.19 L/L . what erythrocyte morphology would you expect to see on the periphal blood smear ?
- microcytic hypochromic cells
When reviewing a peripheral blood smear. the clinical labratory scientist notes many macrocytes . the MCV has been reported as 85 FL . This appearent discrepancy may indicate that ?
The smear was made from the wrong
sample
sample
In the performance of amodified Westergren ESR . what is the recommened dilution
--- 1/5 ( volume diluent +4 volumes blood )
many schizocytes are seen on aperiphral blood smear . one of the most common causes for these cells is :
--- microangiopathic anemia
Which of the following procedures is not necessary to confirm the majority of iron realted anemias
Bone marrow evulation
Afalesly elevated G- 6- PD assay using the fluorescent spot test may be seen in patieants with ?
the presence of many reticulocytes
The presence of microorganisms, increased protein and a high leukocyte count in CSF will cause the CSF to appear :
--- cloudy or turbid
--- cloudy or turbid
In selecting material for smears of bone marrow cell morphology the clinical labratory scientist should select:
--- gray particles floating in blood and fat droplets
Which of the following would be an acceptable specimen for semen analysis
--- Collected at the office without a
--- Collected at the office without a
condom and eximened in 1 hour
The coagulation factor defiency
that can display both an abnormal PT and APTT is factor
that can display both an abnormal PT and APTT is factor
--- X
A patient has an abnormal thrombin time and normal reptilase time .Which of the following can produce this results :
--- Heaparin
The most frequent hereditary condition predisposing to venous thrombosis is
--- activeted protein C resistant
anexpectedly small anticoagulant response to heparin therapy may be caused by decreased levels of :
--- anti thrombin
Un fractionated heparin must have
which one of the following coagulation inhibitors present in normal amounts in order for it to properly anticoagulate a patient :
which one of the following coagulation inhibitors present in normal amounts in order for it to properly anticoagulate a patient :
--- Anti thrombin 111
The formation of D-dimeris the by- product of the effect of plasmin on :
--- across- linked fibrin
In the performance of platelet aggregometry on patient samples the instrument should be set to 100%
transmittance using :
transmittance using :
--- patieant platelet - poor plasma (PPP)
Which is the following conditions can cause a prolonged thrombin
clotting time
clotting time
--- Pro thrombin deficiency
The most common generalized
hemostiatic disorder is :
hemostiatic disorder is :
--- liver disease
Red blood cells morphology characteristic of multiple myeloma
--- Rouleaux
--- Rouleaux
All of the peripheral blood smears made by a certain clinical laboratory technician are too thick . Which of the following corrective actions should be
taken:
taken:
--- Lower the angle of the spreader slide to 45 degrees
Which of the following cells may be found only in ascitic fluid
--- Mesothelial cells
The first of 3 tubes of CSF appearspink
and cloudy the remaining 2 tubes appear to be clear and colorless This is indicative of a/an
and cloudy the remaining 2 tubes appear to be clear and colorless This is indicative of a/an
--- traumatic tap
secondary granules first appear in which stage of neutrophilic development
--- Myelocyte
؟ A supravital stain must be used to demonstrate the presence of
reticulum
An erroneously high spin hematocrit can be caused by
reading the buffy coat as the part of the packed -cell portion
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