TECNICAS CIENTIFICAS PARA LABORATORIO S.A. T620 Benutzerhandbuch
ISEsweat
- User’s Manual 46
Causes for repeating the sweat chloride determination (Sweat Test)
All positive results of chloride in sweat must be repeated and confirmed with the mutation
determination. CF diagnosis should not be based in only one positive test.
All doubtful results about the chloride results obtained from the sweat test (with a chloride
concentration between 40 and 60 mmol/L) should be repeated. If results are still in the
intermediate level, some additional tests will be useful.
intermediate level, some additional tests will be useful.
Collection and determination of chloride in sweat must be repeated in CF confirmed
patients who do not follow the expected clinical pattern. In order to monitor the patient’s
course, clinical, laboratory and thorax X-ray results must be coherent with CF diagnosis.
It is particularly important to evaluate patients again whose initial diagnosis was made
based on the delayed growth or on a positive familiar history; or whose clinical symptoms
prior to the initial sweat test disappear, or there features are in keeping with asthma, with
no suppurative lung illness, or where there is a normal growth pattern, without evidence
of Hippocratic fingers, Pseudomonas colonization or any changes in thorax x-rays.
course, clinical, laboratory and thorax X-ray results must be coherent with CF diagnosis.
It is particularly important to evaluate patients again whose initial diagnosis was made
based on the delayed growth or on a positive familiar history; or whose clinical symptoms
prior to the initial sweat test disappear, or there features are in keeping with asthma, with
no suppurative lung illness, or where there is a normal growth pattern, without evidence
of Hippocratic fingers, Pseudomonas colonization or any changes in thorax x-rays.
The sweat collection can be repeated at any time after the first test, but it is advisable to
do it when the patient is clinically stable and hydrated, with no accute intercurrent illness
and is not taking mineralocorticoids.
and is not taking mineralocorticoids.
Illnesses or disorders associated with a high electrolytes sweat concentration, not
related to Cystic Fibrosis:
related to Cystic Fibrosis:
Sweat test indicators: (*)
Pulmonary and upper
respiratory tract
Gastrointestinal
Metabolic and others
Chronic cough
Recurring or chronic
pneumonia
Wheezing
Hyperinflation
Tachypnea
Retraction
Atelectasis (particulary at the
right upper lobe)
Bronchiectasis
Hemoptiysis
Mucoid infection by
pseudomonas
Nasal polyps
Pansinusitis
Hippocratic fingers
Recurring or chronic
pneumonia
Wheezing
Hyperinflation
Tachypnea
Retraction
Atelectasis (particulary at the
right upper lobe)
Bronchiectasis
Hemoptiysis
Mucoid infection by
pseudomonas
Nasal polyps
Pansinusitis
Hippocratic fingers
Meconium ileus
Meconium plug syndrome
Prolonged neonatal jaundice
Steatorrhea
Rectal prolapse
Mucoid impacted appendix
Late intestinal obstructoin
Recurring intussusception
Cirrhosis
Portal hypertension
Recurring pancreatitis
Meconium plug syndrome
Prolonged neonatal jaundice
Steatorrhea
Rectal prolapse
Mucoid impacted appendix
Late intestinal obstructoin
Recurring intussusception
Cirrhosis
Portal hypertension
Recurring pancreatitis
Positive family history
Growing delay
Salted skin taste
Salt crystals on the skin
Salt-depletion syndrome
Metabolic alkalosis
Hypoprothrombinemia
A Vitamin deficiency
(Fontanelle bulging is a key sign)
Azoospermia
Missing vas deferens
Scrotal calcification
Hypoproteinemia
Edema
Growing delay
Salted skin taste
Salt crystals on the skin
Salt-depletion syndrome
Metabolic alkalosis
Hypoprothrombinemia
A Vitamin deficiency
(Fontanelle bulging is a key sign)
Azoospermia
Missing vas deferens
Scrotal calcification
Hypoproteinemia
Edema
(*) Taken from CLSI C34-A3 protocol
Anorexia nerviosa
Klinefelter’s syndrome
Atopic dermatitis
E1 Prostaglandin long term infussion
Autonomic dysfunction
Mauriac’s síndrome (malnutrition)
Ectodermal dysplasia
Mucopolysaccharidosis type I
Environmental deprivation
Nephrogenic diabetes insipidus
Familiar cholestasis (Byler’s disease)
Nephrosis
Fucosidosis
Protein-calorie malnutrition
Problema de adaptación psicosocial
Pseudohypoaldosteronism
Hypogammaglobulinemia
Untreatable suprarrenal failure
Glucose-6-phosphate dehydrogenase deficiency Untreatable hypothyroidism
Glycogen type 1 storage disordr
Glycogen type 1 storage disordr