Ignite Creation Date:
2024-05-05 @ 4:59 PM
Last Modification Date:
2024-10-26 @ 9:26 AM
Study NCT ID:
NCT00361192
Status:
UNKNOWN
Last Update Posted:
2006-12-06
First Post:
2006-08-06
Brief Title:
Sensitivity and Specificity of Color Doppler Directed Temporal Artery Biopsy as Compared to Standard Random Biopsy in the Diagnosis of Temporal Arteritis
Sponsor:
Shaare Zedek Medical Center
Organization:
Shaare Zedek Medical Center
Study Overview
Official Title:
None
Status:
UNKNOWN
Status Verified Date:
2006-08
Last Known Status:
RECRUITING
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
No
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
Introduction
Temporal arteritis TA is the most common primary vasculitis in the adult population TA is a systemic multi-organ disease but primarily involves the cranial arteries especially the temporal artery The signs and symptoms of the disease are variable and therefore the differential diagnosis is often difficult The annual incidence of the disease in the population above the age of 50 in Jerusalem is about 10 per 100000
Diagnosis is based on the clinical findings and confirmed by biopsy of the temporal artery positive for histologic findings of arteritis Though the biopsy procedure is minor and can be accomplished under local anesthesia it is not without morbidity Along with minor pain more serious complications - facial nerve injury ptosis stroke and local necrosis of skin - have been reported
A negative biopsy does not completely rule out the diagnosis of TA because of the segmental nature of the inflammation Even if one removes an appropriate length of artery usually 1-2 cm the possibility exists that an involved segment may not have been included and the biopsy will be reported as normal
It has recently been reported that color Doppler ultrasonography can be used to diagnose TA Arterial inflammation causing peri-vascular edema appearing as a dark halo and segmental stenosis of the temporal artery are characteristic ultrasound findings suggestive of TA If there is no dark halo sign a diagnosis of TA cannot be supported and temporal artery biopsy can be avoided in most of these patients The presence of the dark halo sign has a positive predictive value of only 50
As noted above the disease is characterized by segmental involvement of the artery and to avoid a false negative biopsy excision of up to 3cm of the artery has been recommended thereby increasing the morbidity and leading patients to refuse the procedure Use of ultrasound-guided biopsy of the artery may dramatically raise the sensitivity and specificity of the biopsy and reduce the requirement for excising long segments of artery
Objective
The objective of this study is to examine the use of ultrasound-guided biopsy of the temporal artery in the diagnosis of TA Ultrasound-guided biopsy will be compared to the standard random biopsy generally in use Appropriate statistical methods will be employed
Methods
The Vascular Laboratory in Shaare Zedek Medical Center performs approximately 200 Doppler ultrasound studies of the temporal artery each year at the request of community-based physicians Some of these patients are then also referred for biopsy of the temporal artery at various surgical facilities in the city In collaboration with the referring physician the patients will be offered a combined diagnostic Doppler ultrasound and guided biopsy on the basis of clinical guidelines and according to the ultrasound findings as described below
Patients suffering from signs and symptoms consistent with TA and who have not undergone previous temporal artery biopsy will be included
Patients suffering from isolated polymyalgia rheumatica will be excluded Patients who are already undergoing steroid treatment will be excluded Patients with an ultrasound study that is positive for the dark halo sign will be divided into two groups on a random basis after obtaining informed consent
One group will undergo ultrasound-guided biopsy while the other will undergo biopsy as is the standard practice in our institution - a 1-2cm length of temporal artery will be excised from the preauricular area
If the ultrasound is negative no biopsy will be done in the setting of this study
It is expected that about 50 patients will be accrued during the 6-month study period Differences in outcome will be analyzed using Fishers exact test
Approval from the Helsinki committee of Shaare Zedek Medical Center has been requested
Temporal arteritis TA is the most common primary vasculitis in the adult population TA is a systemic multi-organ disease but primarily involves the cranial arteries especially the temporal artery The signs and symptoms of the disease are variable and therefore the differential diagnosis is often difficult The annual incidence of the disease in the population above the age of 50 in Jerusalem is about 10 per 100000
Diagnosis is based on the clinical findings and confirmed by biopsy of the temporal artery positive for histologic findings of arteritis Though the biopsy procedure is minor and can be accomplished under local anesthesia it is not without morbidity Along with minor pain more serious complications - facial nerve injury ptosis stroke and local necrosis of skin - have been reported
A negative biopsy does not completely rule out the diagnosis of TA because of the segmental nature of the inflammation Even if one removes an appropriate length of artery usually 1-2 cm the possibility exists that an involved segment may not have been included and the biopsy will be reported as normal
It has recently been reported that color Doppler ultrasonography can be used to diagnose TA Arterial inflammation causing peri-vascular edema appearing as a dark halo and segmental stenosis of the temporal artery are characteristic ultrasound findings suggestive of TA If there is no dark halo sign a diagnosis of TA cannot be supported and temporal artery biopsy can be avoided in most of these patients The presence of the dark halo sign has a positive predictive value of only 50
As noted above the disease is characterized by segmental involvement of the artery and to avoid a false negative biopsy excision of up to 3cm of the artery has been recommended thereby increasing the morbidity and leading patients to refuse the procedure Use of ultrasound-guided biopsy of the artery may dramatically raise the sensitivity and specificity of the biopsy and reduce the requirement for excising long segments of artery
Objective
The objective of this study is to examine the use of ultrasound-guided biopsy of the temporal artery in the diagnosis of TA Ultrasound-guided biopsy will be compared to the standard random biopsy generally in use Appropriate statistical methods will be employed
Methods
The Vascular Laboratory in Shaare Zedek Medical Center performs approximately 200 Doppler ultrasound studies of the temporal artery each year at the request of community-based physicians Some of these patients are then also referred for biopsy of the temporal artery at various surgical facilities in the city In collaboration with the referring physician the patients will be offered a combined diagnostic Doppler ultrasound and guided biopsy on the basis of clinical guidelines and according to the ultrasound findings as described below
Patients suffering from signs and symptoms consistent with TA and who have not undergone previous temporal artery biopsy will be included
Patients suffering from isolated polymyalgia rheumatica will be excluded Patients who are already undergoing steroid treatment will be excluded Patients with an ultrasound study that is positive for the dark halo sign will be divided into two groups on a random basis after obtaining informed consent
One group will undergo ultrasound-guided biopsy while the other will undergo biopsy as is the standard practice in our institution - a 1-2cm length of temporal artery will be excised from the preauricular area
If the ultrasound is negative no biopsy will be done in the setting of this study
It is expected that about 50 patients will be accrued during the 6-month study period Differences in outcome will be analyzed using Fishers exact test
Approval from the Helsinki committee of Shaare Zedek Medical Center has been requested
Detailed Description:
None
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?:
None