Type of test Nuclear scan

Normal findings

No signs of WBC localization outside the liver or spleen

 Test explanation and related physiology

 This test is based on the fact that WBCs are attracted to an area of infection or inflammation. When a patient is suspected of having had infection or inflammation yet the site cannot be localized, the injection of radiolabeled WBCs may identify and localize the area of inflammation or infection. This is especially helpful in patients who have a fever of unknown origin, suspected occult intraabdominal infection, or suspected (yet radiographically inapparent) osteomyelitis. The scan can differentiate infectious from noninfectious processes. For example, it is used to indicate whether an abnormal mass (e.g., a pancreatic pseudocyst) is infected. Areas of noninfectious inflammation (e.g., inflammatory bowel disease) also take up radiolabeled WBCs.

This scan requires drawing blood from the patient, separating out the WBCs, labeling the WBCs with technetium or indium, and reinjecting them back into the patient. Imaging of the whole body 4 to 24 hours later may show an area of increased radioactivity suggestive of accumulation of the radiolabeled WBCs in an area of infection or inflammation.

Procedure and patient care

 Before

* Explain the procedure to the patient. See p. xviii for radiation exposure and risks.

* Assure the patient that he or she will not be exposed to large amounts of radioactivity because only tracer doses of the iso tope are used.

* Tell the patient that no preparation or sedation is required.

 During

• Note the following procedural steps:

1. Approximately 40 to 50 mL of blood is withdrawn from the patient, and the WBCs are extracted from the rest of the blood cells. The WBCs are suspended in saline and tagged with ⁹⁹mtechnetium (⁹⁹mTc) or ¹¹¹indium (¹¹¹In) lipid-soluble product.

2. The tagged WBCs are reinjected into the patient.

3. At 4, 24, and 48 hours after injection, a gamma ray detector/camera is placed over the body.

 4. The patient is placed in supine, lateral, and prone positions so that all surfaces of the body can be visualized.

5. The radionuclide image is recorded on film.

After

* Inform the patient that because only tracer doses of radioisotopes are used, no precautions need to be taken against radioactive exposure.

Abnormal findings

• Infection (e.g., abscess or osteomyelitis)

 • Inflammation (e.g., inflammatory bowel disease, arthritis)

اخر الاخبار

اخبار العتبة العباسية المقدسة

قسم العلاقات العامة يسلم دعوة الملتقى التربوي التنسيقي الثاني لتربية محافظة ذي قار

شعبة فاطمة بنت أسد تجري الاختبارات النهائية للمشاركات في دورة هدى للناس

قسم الشؤون الفكرية يصدر الجزأين الأول والثاني من سلسلة تاريخ الاستعمار

جمعت بين الدقة والجمال.. متحف الكفيل يضم سجادة نادرة تعود لأكثر من ثمانية عقود

المزيد

الآخبار الصحية

عناصر منزلية قد تؤثر على الخصوبة وفرص الحمل

شكل الدماغ قد يتنبأ بخطر الخرف قبل سنوات

طريقة صينية بسيطة للوقاية من السكري

هل تساعد المانغو في الوقاية من السكري؟

المزيد

الآخبار التكنلوجية

رقم غامض ولا إنترنت.. متوجون بنوبل للطب لم يعلموا بفوزهم

"سيري" تحت المجهر.. تحقيق فرنسي جديد ضد شركة "آبل"

أميركيان وياباني يفوزون بجائزة نوبل للطب

تحول غير مسبوق.. إنستغرام تمنح مفاتيحها للمستخدمين

المزيد

مواضيع ذات صلة

white blood cell count and differential count (WBC and differential, Leukocyte count)

vitamin D (25-hydroxy vitamin D2 and D3 ; 1,25-dihydroxyvitamin D [1,25(OH)2 D])

Basal Hormone Measurements of Testis

vitamin B12 (Cyanocobalamin and methylmalonic acid [MMA])

virus testing

viral cultures

Laboratory Investigations of Pheochromocytoma and Paraganglioma

varicella virus testing (Antibody testing for Varicella zoster virus, Varicella zoster virus [VZV], Herpes virus-3)

uroporphyrinogen-1-synthase

urine culture and sensitivity (C&S)

uric acid, blood, and urine

urea breath test (UBT, Helicobacter pylori breath test)