Also found in: Dictionary, Acronyms, Encyclopedia, Wikipedia.
acaThe first automated random-access analyser. When introduced by DuPont Chemical Diagnostics division in 1968, the aca had a menu of 8 tests; the current generation has a menu of more than 100.
acute cutaneous anaphylaxis
acquired child aphasia
acrodermatitis chronica atrophicans
acute cerebellar ataxia
adenylyl cyclase A
adrenal cortex autoantibodies
anterior cerebral artery
anterior communicating artery
Area Cost Adjustment (Medspeak-UK)
acaLab medicine The very first automated random-access analyzer. See Random access analyzer.
Antibodies, Cardiolipin, Immunoglobulin A, Immunoglobulin G, and Immunoglobulin M
SpecimenSerum (1 mL) collected in a red-top tube.
|IgA (APL = 1 unit IgA phospholipid)||IgG (GPL = 1 unit IgG phospholipid)||IgM (MPL = 1 unit IgM phospholipid)|
|Negative: 0–11 APL||Negative: 0–14 GPL||Negative: 0–12 MPL|
|Indeterminate: 12–19 APL||Indeterminate: 15–19 GPL||Indeterminate: 13–19 MPL|
|Low-medium positive: 20–80 APL||Low-medium positive: 20–80 GPL||Low-medium positive: 20–80 MPL|
|Positive: Greater than 80 APL||Positive: Greater than 80 GPL||Greater than 80 MPL|
- Vascular thrombosis confirmed by histopathology or imaging studies
- Pregnancy morbidity defined as either one or more unexplained deaths of a morphologically normal fetus at or beyond the 10th week of gestation
- One or more premature births of a morphologically normal neonate before the 34th week of gestation due to eclampsia or severe pre-eclampsia
- Three or more unexplained consecutive spontaneous abortions before the 10th week of gestation
Laboratory criteria (all measured by a standardized ELISA, according to recommended procedures)
- ACA IgG, or IgM, detectable at greater than 40 units on two or more occasions at least 12 wk apart
- Lupus anticoagulant (LA) detectable on two or more occasions at least 12 wk apart
- Anti-β2glycoprotein 1 antibody, IgG, or IgM detectable on two or more occasions at least 12 wk apart
This procedure is contraindicated for
- Assist in the diagnosis of antiphospholipid antibody syndrome
While ACAs are observed in specific diseases, the exact mechanism of these antibodies in disease is unclear. In fact, the production of ACA can be induced by bacterial, treponemal, and viral infections. Development of ACA under this circumstance is transient and not associated with an increased risk of antiphospholipid antibody syndrome. Patients who initially demonstrate positive ACA levels should be retested after 6 to 8 wk to rule out transient antibodies that are usually of no clinical significance.
- Antiphospholipid antibody syndrome
- Drug reactions
- Infectious diseases
- Mitral valve endocarditis
- Patients with lupuslike symptoms (often antinuclear antibody–negative)
- Placental infarction
- Recurrent fetal loss (strong association with two or more occurrences)
- Recurrent venous and arterial thromboses
- Drugs that may increase anticardiolipin antibody levels include chlorpromazine, penicillin, procainamide, phenytoin, and quinidine.
- Cardiolipin antibody is partially cross-reactive with syphilis reagin antibody and lupus anticoagulant. False-positive rapid plasma reagin results may occur.
Nursing Implications and Procedure
Potential nursing problems
|Problem||Signs and Symptoms||Interventions|
|Fear (Related to possible loss of potential child; disability; death)||Verbalization of fear; restlessness; increased tension; continuous questioning; increased blood pressure, heart rate, respiratory rate||Provide specific and culturally appropriate education; assist the patient and family to recognize effective coping strategies; assist the patient to acknowledge fear; provide a safe environment to decrease fear; explore cultural influences that may enhance fear; utilize therapeutic touch as appropriate to decrease fear; collaborate with social services to address specific medical problems associated with fear|
|Grief (Related to placental infarction associated with placental cell death resulting in loss of potential child)||Apparent psychological and emotional distress; withdrawal; detachment; loss of appetite; refusal to participate in activities of daily living; anger; blame||Assess decision-making ability; encourage expression of grief; provide contact information for grief support group; assist to identify current support group; provide social services referral as appropriate; allow the patient to recall the loss and express feelings|
|Spirituality (Related to significant loss; fear of death; debilitation disease process)||Forgiveness; acceptance; anger at spiritual leaders; expressed feelings of hopeless, powerlessness; abandonment; refusals or inability to participate in spiritual activities (prayer); expresses feelings over lack of meaning with life or serenity||Encourage the verbalization of feelings in a safe nonjudgmental environment; assess the desire for contact from associated spiritual leader; foster a supportive relationship with the patient and family; encourage a display of objects (spiritual, religious) that provide emotional relief; asses for expressions of hope|
|Family process (Related to altered role performance secondary to disease progression)||Inability to perform in supportive family role; alteration in family finances; change in communication patterns; change in the assignment of family tasks and the performance of those tasks; alterations in intimacy||Family counseling; facilitating opportunities for the patient and family to express their feelings; assess the patient and family perception of the problems; evaluate patient and family weaknesses, strengths, and coping strategies; help the family and patient break down concerns into manageable parts|
- Positively identify the patient using at least two unique identifiers before providing care, treatment, or services.
- Patient Teaching: Inform the patient this test can assist in evaluating the amount of potentially harmful circulating antibodies.
- Obtain a history of the patient’s complaints, including a list of known allergens, especially allergies or sensitivities to latex.
- Obtain a history of the patient’s hematopoietic, immune, and reproductive systems; symptoms; and results of previously performed laboratory tests and diagnostic and surgical procedures.
- Obtain a list of the patient’s current medications, including herbs, nutritional supplements, and nutraceuticals (see Effects of Natural Products on Laboratory Values online at DavisPlus).
- Review the procedure with the patient. Inform the patient that specimen collection takes approximately 5 to 10 min. Address concerns about pain and explain that there may be some discomfort during the venipuncture.
- Sensitivity to social and cultural issues, as well as concern for modesty, is important in providing psychological support before, during, and after the procedure.
- Note that there are no food, fluid, or medication restrictions unless by medical direction.
- Potential complications: N/A
- Avoid the use of equipment containing latex if the patient has a history of allergic reaction to latex.
- Instruct the patient to cooperate fully and to follow directions. Direct the patient to breathe normally and to avoid unnecessary movement.
- Observe standard precautions, and follow the general guidelines in Patient Preparation and Specimen Collection. Positively identify the patient, and label the appropriate specimen container with the corresponding patient demographics, initials of the person collecting the specimen, date, and time of collection. Perform a venipuncture.
- Remove the needle and apply direct pressure with dry gauze to stop bleeding. Observe/assess venipuncture site for bleeding or hematoma formation and secure gauze with adhesive bandage.
- Promptly transport the specimen to the laboratory for processing and analysis.
- Inform the patient that a report of the results will be made available to the requesting health-care provider (HCP), who will discuss the results with the patient.
- Recognize anxiety related to test results, and be supportive of fear of shortened life expectancy. Discuss the implications of abnormal test results on the patient’s lifestyle. Provide teaching and information regarding the clinical implications of the test results, as appropriate. Educate the patient regarding access to counseling services. Provide contact information, if desired, for the Lupus Foundation of America (www.lupus.org).
- Depending on the results of this procedure, additional testing may be performed to evaluate or monitor progression of the disease process and determine the need for a change in therapy. Evaluate test results in relation to the patient’s symptoms and other tests performed.
- Reinforce information given by the patient’s HCP regarding further testing, treatment, or referral to another HCP.
- Answer any questions or address any concerns voiced by the patient or family.
Expected Patient Outcomes
- States understanding that fetal loss may be associated with placental infarct.
- States understanding of the importance in identifying a support system that can assist with coping with the spiritual distress of grief and loss.
- Attends recommended grief counseling for emotional and psychological support related to fetal loss.
- Actively participates in the provision of self-care associated with the activities of daily living.
- Seeks assistance from spiritual leader to relieve emotional distress associated with loss of potential child, or loss of function secondary to disease process.
- Agrees to listen to the designated spiritual leader to assist in decreasing grief, loss.
- Related tests include ANA, CBC, CBC platelet count, fibrinogen, lupus anticoagulant antibodies, protein C, protein S, and syphilis serology.
- See the Hematopoietic, Immune, and Reproductive systems tables at the end of the book for related tests by body system.
Patient discussion about aca
Q. What is the difference between alcoholism, alcohol abuse and alcohol dependent?
Q. My son who is an alcohol abuse is undergoing treatment? My son who is an alcohol abuse is undergoing treatment. He stops his medicines in the middle of the treatment and restart taking alcohol. Doctor had warned to stop consuming alcohol in excess. With heavy drink he comes late at night and it frightens me. He drinks alcohol very badly and behaves violent also. He says he cannot stop. I am getting worried and was finding some information about the harm effects the excess drinking can bring to him?
Q. Does alcohol drinking act as a catalyst of a problem? Does alcohol drinking act as a catalyst of a problem? My father has been battling depression and anxiety for many years and he used to drink in the past. Recently his behavior associated with drinking is visible and I strongly suspect that he is drinking again. Generally we get silly after drinking but my dad`s perception are altered in a negative way….