Diagnostics in Diverticulitis (DIDit)

Uppsala University

Status: Completed

Conditions: Diverticulitis

Treatments: Radiation: Low dose CT without intravenous contrast

Study type: Interventional

Funder types: Other

Identifiers

NCT03443011

Dnr 2016/411

Details and patient eligibility

About

This study focuses on if low dose CT without intravenous contrast has a high enough specificity and sensitivity for acute diverticulitis that it can be used as the primary diagnostic method instead of a full dose CT with intravenous contrast which is the standard method in Sweden.

Full description

Patients will be recruited from the emergency departments in Mora and Vastmanland hospitals. All patients over the age of 50 with clinically suspected acute diverticulitis that meet inclusions criterium will be asked for participation. A Clinical examination and blood samples will be drawn.

Subjects will be sent to the radiology department where they will undergo computed tomography (CT) of the abdomen. The CT protocol consists of a low dose non contrast enhanced CT followed by a normal dose CT with intravenous contrast. This is needed as randomization of patients is not possible due to the fact that the Clinical diagnosis of diverticulitis is difficult and unreliable. This would lead to the situation that we would not know if a participant in the low dose CT Group has diverticulitis which was not seen with the low dose protocol or if the patient did not have diverticulitis.

The radiologist on call will examine the full dose CT examination and write a report as routine. At a later date Three blinded radiologists will examine first all low dose CT examinations and grade them according to our CT protocol. At a later date the radiologists will evaluate all full dose CT examinations using the same CT protocol.

Findings will then be compared between the two different CT methods and sensitivity and specificity for low dose CT will be calculated.

Enrollment: 149 patients

Sex: All

Ages: 50+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Over the age of 50
• Clinically suspected acute diverticulitis
• Low abdominal pain
• WBC over 10 x 109/L or raised C-reactive protein levels 25 mg/L

Exclusion criteria

• Pregnancy
• Previous allergy to intravenous contrast
• Renal failure or other reasons that the patient cannot undergo CT with iv contrast
• Unable to give informed consent
• Dementia
• Language barrier

Trial design

Primary purpose: Diagnostic

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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149 participants in 1 patient group

participants

Experimental group

Description:

All participants will be examined with both CT techniques. First a low dose CT without intravenous contrast followed by the standard method, a full dose CT with intravenous contrast

Treatment:

Radiation: Low dose CT without intravenous contrast