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The question and answer section is a repository of user generated questions regarding material posted on this web site. We encourage visitors to submit questions and we will attempt to provide prompt responses via e-mail and this Q & A database. Sharing ideas will allow all of us to navigate our laboratories through calmer seas.



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Top 5 Articles
What is the relationship between APTT and INR(internationaly normalised rate)
There is no relationship between the APTT and the INR. INR is related to the Prothrombin Time, which is also commonly called the protime or PT.   While the Prothrombin Time ......
Not Rated Last Update: 2009-01-25 Views: 48
A patient with an RH weakly positive begin transfusion with RH positive blood unit. The transfusion was discontinued because later the Medical Technologist check that the protocol recommend that recipient Du positive ( weakly positive Rh) needs to be transfused with blood RH negative. The protocol said that a weakly positive RH person shoul d be considered as RH negative recipient and as RH positive donor. The patient is fine. No change in his test before and after the transfufion. Should this even be consdered a Sentinel event that has to be reported to the JCHA ect.?
Historically, if a patient typed as Rh negative, additional testing was then performed to determine if they had Rh Du or weak D expression. In the past several years, weak D ......
●●●●● Last Update: 2007-11-02 Views: 33
I read that 25% of raynaud's phenomenom patients have centromere antibodies. Does this mean that these patients are at risk for scleroderma or just that centromere antibodies are associated with raynaud's by itself?
Raynaud phenomenon is diagnosed either by physical examination or by eliciting a specific clinical history. An ANA test does not help establish the diagnosis, but may provide prognostic information. Raynaud phenomenon ......
Not Rated Last Update: 2007-11-02 Views: 32
What is the normal range for early morning creatinine to cortisol ratio? I am intending to use it as a screening tool for hypercortism and can only seen to find ref ranges for animals!
You ask what is the normal range for early morning creatinine to cortisol ratio. It is not clear if you are planning to measure cortisol in plasma or urine. I am ......
●●● Last Update: 2007-11-02 Views: 23
What are the hematologic manifestations of congenital infections? e.g. CMV, toxoplasmosis. We have a 3 month old patient with myocarditis, microcephaly, rash and hemolytic anemia. Toxic changes and thrombocytosis seen on smear... Is this consistent with a dx of congenital CMV or congenital Toxoplasmosis? And if untreated, what is the course of these hematologic changes? When do they return to normal?
Laboratory findings in congenital toxoplasmosis include leukocytosis, predominately due to an increase in lymphocytes and reactive lymphocytes. The most common hematologic complication is hemolytic anemia.   The most common hematologic findings ......
●● Last Update: 2007-11-02 Views: 22
Last 5 Articles
My husband had an ACTH Stimulation test. His results follow: Baseline Cortisol: 18.4 ug/dL (5.0-24.0 ug/dL) Baseline ACTH: 22pg/mL (10-60 pg/mL) Cortisol: 31.0 first draw Cortisol:33.7 second draw Our doctor never explained this to us at all. We were under the impression that the cortisol draws were to double. The second cortisol draw is not much more than the first one. We see the doctor Wed. April 29. and I would like to have something to show her on how this test is to be read. My husband also has low thyroid. If there is a pit problem we want to know so we can have it looked into. Thank you so much for your help. I will be waiting for your response in my email.
My interpretation of these laboratory results is that your husband does not have either primary or secondary adrenal insufficiency because his baseline ACTH and cortisol levels were within the reference ranges ......
Not Rated Last Update: 2009-05-24 Views: 1
In tube testing, should the DAT of a cord blood profile be read microscopically? Why or why not?
Cord blood DAT should be read microscopically so that weakly positive reactions are not missed. Red cells must be carefully washed to prevent falsely positive results. ...
Not Rated Last Update: 2009-05-24 Views: 1
I am trying to find a formula to convert an alcohol reading in mg/dl into an equivalent reading that would be obtained from a breathalyzer (%BAC). Any help or advice you can provide would be most appreciated.
A legal blood alcohol concentration is often expressed as the percentage of alcohol by weight (i.e. grams of ethanol in 100 mL of blood). Clinical laboratories generally report ethanol concentration in ......
Not Rated Last Update: 2009-05-24 Views: 1
After 16 months of pure hell, my 12 yr old daughter was finally diagnosed with Acute Intermittent Porphyria via genetic testing. As she is adopted, there is little info re biological parent (only minimal info on biomother which states she is 'bipolar'). On your page re Tests/Porphyrins under the heading of Acute Neurologic Porphyrias there is reference to "Neuromuscluar weakness can progress rapidly to paralysis and respiratory failure." and "...respiratory paralysis." Would you be so kind as to provide a source for this information? By October/November of this year, she was hospitalized again and experienced seizures and respiratory distress. The drs thought I was nuts when I demanded that she be given oxygen via face mask to help her through the seizures. Ativan did not revive her the third time, but oxygen always does. In fact, when she was being taken out of school due to yet another "fainting" episode, it occurred to me that she was not, as the EMTs said, hyperventilating, but rather, HYPOventilating. Does anyone know what happens to the oxygen binding at the tissue or cellular levels during AIP attacks? According to American Porphyria Foundation, she is the FIRST child they know of whose actually been confirmed to have AIP. In talking with Dr. Bonkovsky, noted expert on AIP (Carolinas Medical Center) and Desiree Lyon, director, American Porphyria Foundation, respiratory distress is not an AIP symptom. Huh. I'm just a MOM, but I know when my kid can't breath, and isn't faking it!! I'd appreciate any source info you can provide.
The primary reference for the information contained in the Porphyrin test interpretation was an article entitled: The Challenges of Testing for and Diagnosing Porphyrias that was published in Communique; November 2002, ......
Not Rated Last Update: 2009-02-14 Views: 5
do you run anti-hu antibody test? if not, do you knw what lab runs this test? thank you
ClinLabNavigator provides education about laboratory tests. We do not perform testing. Mayo Medical Laboratories does test for anti-Hu autoantibody as part of their Paraneoplastic Autoantibody Evaluation. Anti-Hu is named anti-Neuronal Nuclear Antibody, Type 1. ......
Not Rated Last Update: 2009-02-14 Views: 1