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+ | [[clinical_biochemistry_section|Home]] | ||
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SAMPLE COLLECTION MANUAL OF LABORATORY SERVICES | SAMPLE COLLECTION MANUAL OF LABORATORY SERVICES | ||
SIR T HOSPITAL, BHAVNAGAR | SIR T HOSPITAL, BHAVNAGAR | ||
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Specific specimen requirements for each test are provided. Submit the quantity specified for each test requested. Tests will be cancelled as " | Specific specimen requirements for each test are provided. Submit the quantity specified for each test requested. Tests will be cancelled as " | ||
- | **Specimen Storage**: Instructions for storage and transport of specimens for individual tests are listed. All serological samples are stored for 72 hrs and all positive serum samples are stored for 15 days then discarded, all HIV positive serum samples are stored for 3 months as per the NACO guidelines. Maintain the specimen at the temperature indicated for each test until specimens are delivered to the laboratory. Most specimens require refrigeration unless otherwise indicated. Most of the specimens require refrigeration unless otherwise indicated. All other samples are retained for 24 hrs and then kept in hypochlorite for 6 hrs before discarding. | + | **Specimen Storage**: Instructions for storage and transport of specimens for individual tests are listed. All serological samples are stored for 72 hrs and all positive serum samples are stored for 15 days then discarded, all HIV positive serum samples are stored for 3 months as per the NACO guidelines. Maintain the specimen at the temperature indicated for each test until specimens are delivered to the laboratory. Most specimens require refrigeration unless otherwise indicated. Most of the specimens require refrigeration unless otherwise indicated. All other samples are retained for 24 hrs and then kept in hypochlorite for 6 hrs before discarding. |
**Stool Specimen Collection (24, 48 or 72-Hour)** | **Stool Specimen Collection (24, 48 or 72-Hour)** | ||
Special gallon-size containers are available upon request for the collection of stool specimens. Refer to specimen requirements for each analyte. | Special gallon-size containers are available upon request for the collection of stool specimens. Refer to specimen requirements for each analyte. | ||
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40%formaldehyde: | 40%formaldehyde: | ||
- Immediately after removal of organ/ | - Immediately after removal of organ/ | ||
- | - Volume of 10%formalin should be 10 times the volume of tissue. | + | - Volume of 10%formalin should be 10 times the volume of tissue. |
- | - Specimens are sent to the Central Pathology Laboratory-transported by hospital class IV staff or patients only in case of OPD patients, between 9a.m.-5p.m.in a capped bottle | + | - The histopathology requisition form should be complete with following details |
- | - of suitable size in formalin. | + | - Specimens are sent to the Central Pathology Laboratory-transported by hospital class IV staff or patients only in case of OPD patients, between 9a.m.-5p.m.in a capped bottle of suitable size in formalin. |
- | - On receipt of specimen/ | + | - On receipt of specimen/ |
- | - necessary returned for correction. | + | |
- If all details are okay, then details are entered in receiving register and a card is given to OPD patients except skin and ENT patients indicating date and time for collection of report form histopathology laboratory. | - If all details are okay, then details are entered in receiving register and a card is given to OPD patients except skin and ENT patients indicating date and time for collection of report form histopathology laboratory. | ||
- | - Specimens are transported to histopathology laboratory in a closed container along | + | - Specimens are transported to histopathology laboratory in a closed container along with forms by class IV and on-duty driver at 12 noon and 4.30pm. |
- | - with forms by class IV and on-duty driver at 12 noon and 4.30pm. | + | - On arrival to histopathology laboratory, specimens and forms are again cross checked by laboratory assistant or technician. |
- | - On arrival to histopathology laboratory, specimens and forms are again cross checked | + | - If all details are okay, then specimen is opened, verified, the formalin changed and transported in new bottle by technical assistant/ |
- | - by laboratory assistant or technician. | + | |
- | - If all details are okay, then specimen is opened, verified, the formalin changed and | + | |
- | - transported in new bottle by technical assistant/ | + | |
- Receipt details are entered in the Histopathology receiving register. | - Receipt details are entered in the Histopathology receiving register. | ||
+ | |||
+ | **Storage of Histopathology specimens: | ||
- | Fluid Pap | + | CYTOPATHOLOGY SAMPLE COLLECTION AND TRANSPORTATION |
- | Collecti | + | |
- | Timing | + | ^ ^Fluid^^Pap^ |
+ | |Collection Timing|Routine|8: | ||
+ | | |Saturday|8: | ||
+ | | |Sunday& | ||
+ | |Amount|Ideal is 10 ml directly from tapping line. Minimum 2 ml. If taken from receptacle, aliquot should be mixed well||1 slide endocervix 1 slide ectocervix | | ||
+ | |Container|Closed cap bottle. BAL fluid in BAL container||Either in wide mouthed closed bottle or wrapped in paper| | ||
+ | |Transport|To be sent to laboratory within 1 hour of collection Ward Ayah or servant will bring to laboratory along with requisition||Patient will bring bottle with slides or dried slides (wrapped) to cytology laboratory| | ||
+ | |Receiving|*R1 will receive it. Check the demographics and sign the register.||*R1 will receive the slides, check requisition form and give pap number on case paper.| | ||
+ | |Responsibility|Collection| Clinical Resident/ | ||
+ | | |Transport| Class IV of ward| Class IV of OPD/ | ||
+ | | |Receiving| R1 Pathology | R1 Pathology| | ||
+ | |||
+ | '' | ||
- | + | **7.1 STANDARD OPERATING PROCEDURE OF RECEIVING ROUTINE SPECIMENS IN HISTOPATHOLOGY** | |
- | + | | |
- | | + | |
- | Rou | + | |
- | tine 8:00 am to 4:00 pm Transfer within 1 hour. During OPD timing. | + | |
- | Fix immediately. | + | |
- | + | | |
- | Sat urd ay 8:00am to 12:00 pm. Transfer within 1 hour. | + | |
- | Sun day | + | - if foamy. |
- | & | + | - Reddish. |
- | Holi Avoid collection.If required to collect, | + | - Top up with formalin if not 10times the volume of the tissue. |
- | aliquot and keep in | + | - If organ is too large for container or if container is cracked or not closing |
- | ward refrigerator at 2-8 C and | + | |
- | Storage of Histopathology specimens: All specimens of histopathology are routinely stored for 3 months and afterwards they are discarded. | + | |
- | + | '' | |
- | CYTOPATHOLOGY SAMPLE COLLECTION AND TRANSPORTATION | + | |
- | + | **7.2 STANDARD OPERATING PROCEDURE OF FNAC SAMPLE COLLECTION PROCEDURE** | |
- | + | ||
- | + | * Procedure is usually performed in sitting position in chair. For Thyroid lesion usually lying down position with pillow under the shoulder is preferred. | |
- | day s transport at 9:00 am on next working day. | + | * Examine the swelling in terms of Location, Size, Shape, Consistency, |
- | Amoun | + | * Clear the area of swelling with skin disinfectant. |
- | t Ideal is 10 ml directly from tapping line. Minimum 2 ml. If taken from receptacle, aliquot should be mixed well. 1 slide endocervix 1 slide ectocervix | + | * Allow it to evaporate. Explain the procedure to the patient. |
- | Contain er Closed cap bottle. BAL fluid in BAL container. Either in wide mouthed closed bottle or wrapped in paper. | + | * Insert the needle (No. 23G) with 10 cc syringe within the target tissue. |
- | Transpo | + | * Pull the plunger to apply negative pressure. |
- | rt To be sent to laboratory within | + | * Move the needle back and forth inside the target tissue. |
- | 1 hour of collection.Ward Ayah or servant will bring to laboratory along with requisition. Patient will bring bottle with slides or dried slides | + | * Release the negative pressure while needle remains in target tissue after obtaining the sample in the hub. |
- | (wrapped) to cytology laboratory. | + | * Withdraw the needle. |
- | Receivi ng *R1 will receive it. Check the demographics and sign the register. *R1 will receive the slides, check requisition form and give pap number on case paper. | + | * Put dry cotton swab with gentle pressure over the puncture site. |
- | Respon | + | * Detach the needle. |
- | sibility | + | * Take out material from the needle on the clean dry glass slide. |
- | + | * Make a smear by using another glass slide. | |
- | | + | * Fix the smear immediately in methanol for H & E stain( for Giemsa stain-air dry smear and then fix). |
- | Resident/ | + | * Write the identity number on the slides and Stain the smear. |
- | Resident/ | + | |
- | Transp ort | + | '' |
- | | + | |
- | Receiv ing R1 Pathology R1 Pathology | + | **7.3 SAMPLE REJECTION CRITERIA BLOOD SAMPLE REJECTION CRITERIA** |
- | STANDARD OPERATING PROCEDURES (LSSTH/ | + | * Improperly filled forms. |
- | + | * Improperly labeled samples. | |
- | + | * Inappropriate quantity of sample. | |
- | 7.1 STANDARD OPERATING PROCEDURE OF RECEIVING ROUTINE | + | * Clotted sample (in Pathology Section) |
- | ● The histopathology requisition form should be complete with following details -name of the patient, age, sex, requisition no., ward no., name of the incharge Dr, history or clinical diagnosis, nature of the specimen, date of operation. | + | * Spill over sample. |
- | ● Specimen should be received only if sent in formalin. | + | * Hemolyzed sample. |
- | ● Note the date of receipt of specimen. | + | * Sample received after 4 hours of collection. |
- | ● After checking all the details give histopathology no. to jar. | + | * Diluted Sample |
- | ● Ask history from patient’s relatives if that found on requisition slip is inadequate. | + | * Improper Vacutainers |
- | ● Give receipt no. and date of issue of report to the patient. | + | |
- | ● Formalin and container should be changed s o s if.. | + | **CRITERIA FOR SAMPLE REJECTION IN HISTOPATHOLOGY** |
- | - if foamy. | + | * Grossly autolysed specimen |
- | - Reddish. | + | * Sample sent without 10/ formalin |
- | - Top up with formalin if not 10times the volume of the tissue. | + | * Container sent without tissue |
- | - If organ is too large for container or if container is cracked or not closing | + | * Quantity of formalin should be approx . 10 times of tissue |
+ | * Appropriate size of container | ||
+ | * Incomplete sample labeling | ||
+ | - Patient’s Name , Reg. no, Ward | ||
+ | - Specimen name | ||
+ | **Incomplete requisition form** | ||
+ | - Patient’s Name, Reg. no, Ward/Unit | ||
+ | - Name of unit Incharge | ||
+ | - Related history and investigation | ||
+ | - Clinical diagnosis | ||
+ | - Specimen name | ||
+ | - Name and signature of authorized person | ||
+ | |||
+ | **FNAC REJECTION CRITERIA** | ||
+ | |||
+ | * Incompletely filled up form. | ||
+ | * Smears not properly labeled. | ||
+ | * Smears are not properly spread. | ||
+ | * Smears containing clots. | ||
+ | * Smears (Material) diluted with blood. | ||
+ | * Smears not properly fixed. | ||
+ | |||
+ | '' | ||
+ | |||
+ | **REJECTION CRITERIA OF MICROBIOLOGY SPECIMENS** | ||
+ | |||
+ | **Purpose: | ||
+ | |||
+ | **General Principle: | ||
+ | Proper collection & transport of specimens is critical to the quality of results produced by the microbiology Laboratory & cannot be overemphasized. The validity of all diagnostic information produced in the lab is contingent on the quality of the specimen received. Consequences of poorly collected and/or poorly transported specimens include failure to isolate the causative organism, and recovery of contaminants or normal flora could lead to improper treatment of the patient. The saying is “garbage in—garbage out”. | ||
+ | |||
+ | **General Consideration: | ||
+ | When a specimen is received in the laboratory, it is subjected to scrutiny & must meet certain minimum requirements before being accepted for testing. | ||
+ | A specimen shall not be rejected until appropriate efforts have been made to correct the problem, but it may be rejected for failing to meet acceptability criteria. | ||
+ | If, needed the specimen is rejected, it is listed on the microbiology disposition log for rejected specimens, along with reason for rejection & documentation of notified personnel. | ||
+ | |||
+ | **Rejection criteria: | ||
+ | A. //SPECIMEN RECEIVED WITHOUT A LABEL OR WITH AN IMPROPER LABEL// | ||
+ | * At a minimum, specimen label must include patient name & reg. no. as the two patient identifiers. | ||
+ | * Call unit, ward or person responsible & notify of the problem. | ||
+ | * If any doubt exists as to origin of specimen, reject & order recollection. | ||
+ | B.// | ||
+ | * Check with person responsible for collection to determine reason for deviation from procedure. Give instruction in the proper method of collection & transport to prevent repetition of the error. | ||
+ | |||
+ | C.// | ||
+ | * Container exteriors must be clean & free of gross contamination. Leaking specimens indicate integrity of the specimen has been compromised & puts transport & laboratory personnel at risk. | ||
+ | |||
+ | D.// | ||
+ | |||
+ | E.// | ||
+ | |||
+ | ^Sr. No.^Specimen type^Test^Rejection Criteria^Report Comment^ | ||
+ | |1|Stool|C& | ||
+ | |2|Sputum|C& | ||
+ | |3|Urine|C& | ||
+ | |4|Dry swabs|C& | ||
+ | |5|Blood cultures, tissues, Sterile body fluids e.g. CSF|C& | ||
+ | |6|All specimen type except: Tissue Sterile, body fluid,Brain & liver abscess, Aspirated pus, Bone & soft tissue biopsies with diagnosis of gas gangrene, necrotizing fasciitis or necrotizing cellulitis |Anaerobic culture| Not submitted in special anaerobic transport media.| “No Anaerobic swab received; anaerobic culture not done.”| | ||
+ | |7|Blood | For serology|* Sample hemolysed.* Not submitted in Red vacuette| * So kindly repeat the sample.” * Please collect blood in Red vacuette.| | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | ^ Name of Laboratory : Laboratory Services Sir T. Hospital (LSSTH), | ||
+ | ^**Document Name**: Documented procedure for primary sample collection & handling(Sample collection manual)^^^ | ||
+ | ^**Unique ID**: LSSTH/ | ||
+ | ^Issue No. : 01^Issue Date : | ||
+ | ^Authorized by: | ||