```xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns4:query_definition xmlns:ns2="http://www.i2b2.org/xsd/cell/crc/psm/1.1/" xmlns:ns4="http://www.i2b2.org/xsd/cell/crc/psm/querydefinition/1.1/" xmlns:ns3="http://www.i2b2.org/xsd/cell/crc/psm/analysisdefinition/1.1/">
    <query_name>K - pl -Na - pl@19:04:49</query_name>
    <query_timing>ANY</query_timing>
    <specificity_scale>0</specificity_scale>
    <panel>
        <panel_number>1</panel_number>
        <panel_timing>ANY</panel_timing>
        <panel_accuracy_scale>100</panel_accuracy_scale>
        <invert>0</invert>
        <total_item_occurrences>1</total_item_occurrences>
        <item>
            <hlevel>4</hlevel>
            <item_name>K - pl (Group:K-pl)</item_name>
            <item_key>\\i2b2_LABS\i2b2\Labtests\LAB\(LLB16) Chemistry\(LLB24) Blood Gases\K-pl\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Labtests \ Chemistry \ Blood Gases \ K - pl (Group:K-pl)</tooltip>
            <class>ENC</class>
            <constrain_by_value>
                <value_operator>LT</value_operator>
                <value_constraint>11</value_constraint>
                <value_unit_of_measure>mmol/l</value_unit_of_measure>
                <value_type>NUMBER</value_type>
            </constrain_by_value>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
    <panel>
        <panel_number>2</panel_number>
        <panel_timing>ANY</panel_timing>
        <panel_accuracy_scale>100</panel_accuracy_scale>
        <invert>0</invert>
        <total_item_occurrences>1</total_item_occurrences>
        <item>
            <hlevel>4</hlevel>
            <item_name>Na - pl (Group:NA-pl)</item_name>
            <item_key>\\i2b2_LABS\i2b2\Labtests\LAB\(LLB16) Chemistry\(LLB24) Blood Gases\NA-pl\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Labtests \ Chemistry \ Blood Gases \ Na - pl (Group:NA-pl)</tooltip>
            <class>ENC</class>
            <constrain_by_value>
                <value_operator>LT</value_operator>
                <value_constraint>10</value_constraint>
                <value_unit_of_measure>mmol/l</value_unit_of_measure>
                <value_type>NUMBER</value_type>
            </constrain_by_value>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find all patients who have had a blood gas test with potassium levels (K-pl) less than 1 mmol/l and sodium levels (Na-pl) less than 10 mmol/l, regardless of the timing of the test, and the results are not inverted. The specificity scale is set to 0, indicating no specificity filter, and the accuracy scale is set to 100, indicating a high level of accuracy for the panel. The query is named "K - pl -Na - pl@19:04:49" and it has two panels. Panel 1 focuses on K-pl, and panel 2 focuses on Na-pl. Both panels have the same timing and accuracy settings, and the query does not include synonyms.