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Very concentrated urine! What is her 24 hour urine volume?? What is her serum urea/Na/K/HCO3/Osmolal and height please? What is the likelihood of DI??? Kind regards Ali Kind Regards ALi Dr Ali Al-bahrani MBCh.B MSc.Chem Path. EuClin.chem. CSci. FRCPath. Lead Pathologist for Blood Sciences Consultant Chemical Pathologist and metabolic medicine and HOD of Blood Sciences St Mary's Hospital Newport Isle of Wight PO30 5TG United Kingdom Te: 01983 534859/534917 From: Clinical biochemistry discussion list [mailto:[log in to unmask]] On Behalf Of BARLOW, Ian (NORTHERN LINCOLNSHIRE AND GOOLE NHS FOUNDATION TRUST) Sent: 16 February 2018 12:02 To: [log in to unmask] Subject: Odd urine creatinine result Dear collective, We have a very unusual urine creatinine result - which has been confirmed by both enzymatic and Jaffe assays, and confirmed on 3 previous occasions. The female patient is a reasonably well 72 years old. She is not taking any medication of note (and not taking any "internet potions"), her BMI is 40 and she does not have a myopathy. Her serum creatinine (enzymatic assay) is 76umol/L. Urine results are as follows:- Urine sodium = 173 mmol/L Urine potassium = 34 mmol/L Urine urea = 292 mmol/L Urine creatinine = <0.1 mmol/L Urine osmolality = 781 mosm/kg. Any ideas? Kind regards Ian Barlow Consultant Biochemist Chemical Pathology Clinical Director [log in to unmask] Scunthorpe General Hospital Diana Princess of Wales Grimsby DDI (01724) 387726 DDI (01472) 875535 Internal SGH Ex 2199 Internal DPoW Ex 7525 ************************************************************************ ******************************************** This message may contain confidential information. If you are not the intended recipient please inform the sender that you have received the message in error before deleting it. Please do not disclose, copy or distribute information in this e-mail or take any action in relation to its contents. To do so is strictly prohibited and may be unlawful. Thank you for your co-operation. NHSmail is the secure email and directory service available for all NHS staff in England and Scotland. NHSmail is approved for exchanging patient data and other sensitive information with NHSmail and other accredited email services. For more information and to find out how you can switch, https://portal.nhs.net/help/joiningnhsmail ------ACB discussion List Information-------- This is an open discussion list for the academic and clinical community working in clinical biochemistry. Please note, archived messages are public and can be viewed via the internet. Views expressed are those of the individual and they are responsible for all message content. ACB Web Site http://www.acb.org.uk Green Laboratories Work http://www.laboratorymedicine.nhs.uk List Archives http://www.jiscmail.ac.uk/lists/ACB-CLIN-CHEM-GEN.html List Instructions (How to leave etc.) http://www.jiscmail.ac.uk/ ------ACB discussion List Information-------- This is an open discussion list for the academic and clinical community working in clinical biochemistry. Please note, archived messages are public and can be viewed via the internet. Views expressed are those of the individual and they are responsible for all message content. ACB Web Site http://www.acb.org.uk Green Laboratories Work http://www.laboratorymedicine.nhs.uk List Archives http://www.jiscmail.ac.uk/lists/ACB-CLIN-CHEM-GEN.html List Instructions (How to leave etc.) http://www.jiscmail.ac.uk/