RSP_K23消息有MSH, MSA, ERR, QAK, QPD, PID几个segment，其中ERR，PID为可选。
1. 当MSA有err时，ERR段填充出错的详细信息。
2. 当MSA为AA，QAK为Ok时，PID不为空； 否则，PID应为空
3. 当MSA有err时， QAK的response status应为AE / AR
4. 当Q23请求的消息中Wanted return domain为空时， k23返回的Patient Id List不应包含Q23中请求时的PID
5. K23返回的消息中PID-6， PID-9即Mother‘s Maiden Name和Patient Alias 应为空；PID-5即Patient Name的第2个实例的Name Type Code应为S， 代表Coded Pseudo-Name to ensure anonymity；
正确消息：
MSH|^~\&|IHE PIX Manager|UIH|NIST_Hydra_PIX_Consumer|NIST|20130810082517||RSP^K23^RSP_K23|IHE PIX Manager-20130810082517-1|P|2.5||||||UNICODE UTF-8
MSA|AE|NIST-20130810082516
ERR|||204^UnknownKeyIdentifier^^^Patient Id is not exist|E
QAK|QRY12434188486468|AE
QPD|Q23^IHE PIX Query|QRY12434188486468|HC-352^^^NIST2010&2.16.840.1.113883.3.72.5.9.1&ISO|^^^NIST2010-2&2.16.840.1.113883.3.72.5.9.2&ISO
MSA|AE|NIST-20130810082516
ERR|||204^UnknownKeyIdentifier^^^Patient Id is not exist|E
QAK|QRY12434188486468|AE
QPD|Q23^IHE PIX Query|QRY12434188486468|HC-352^^^NIST2010&2.16.840.1.113883.3.72.5.9.1&ISO|^^^NIST2010-2&2.16.840.1.113883.3.72.5.9.2&ISO
错误消息1 ：
MSH|^~\&|IHE PIX Manager|UIH|NIST_Hydra_PIX_Consumer|NIST|20130810082517||RSP^K23^RSP_K23|IHE PIX Manager-20130810082517-1|P|2.5||||||UNICODE UTF-8
MSA|AE|NIST-20130810082516
ERR|||204^UnknownKeyIdentifier^^^Patient Id is not exist|E
QAK|QRY12434188486468|AE
QPD|Q23^IHE PIX Query|QRY12434188486468|HC-352^^^NIST2010&2.16.840.1.113883.3.72.5.9.1&ISO|^^^NIST2010-2&2.16.840.1.113883.3.72.5.9.2&ISO
PID|||||^^^^^^L~^^^^^^S|^^^^^^L~^^^^^^S|||^^^^^^L~^^^^^^S
MSA|AE|NIST-20130810082516
ERR|||204^UnknownKeyIdentifier^^^Patient Id is not exist|E
QAK|QRY12434188486468|AE
QPD|Q23^IHE PIX Query|QRY12434188486468|HC-352^^^NIST2010&2.16.840.1.113883.3.72.5.9.1&ISO|^^^NIST2010-2&2.16.840.1.113883.3.72.5.9.2&ISO
PID|||||^^^^^^L~^^^^^^S|^^^^^^L~^^^^^^S|||^^^^^^L~^^^^^^S
错误消息2：
MSH|^~\&|IHE PIX Manager|UIH|NIST_Hydra_PIX_Consumer|NIST|20130810082517||RSP^K23^RSP_K23|IHE PIX Manager-20130810082517-1|P|2.5||||||UNICODE UTF-8
MSA|AE|NIST-20130810082516
ERR|||204^UnknownKeyIdentifier^^^Patient Id is not exist|E
QAK|QRY12434188486468|NF
QPD|Q23^IHE PIX Query|QRY12434188486468|HC-352^^^NIST2010&2.16.840.1.113883.3.72.5.9.1&ISO|^^^NIST2010-2&2.16.840.1.113883.3.72.5.9.2&ISO
MSA|AE|NIST-20130810082516
ERR|||204^UnknownKeyIdentifier^^^Patient Id is not exist|E
QAK|QRY12434188486468|NF
QPD|Q23^IHE PIX Query|QRY12434188486468|HC-352^^^NIST2010&2.16.840.1.113883.3.72.5.9.1&ISO|^^^NIST2010-2&2.16.840.1.113883.3.72.5.9.2&ISO
错误消息3：
MSH|^~\&|IHE PIX Manager|UIH|NIST_Hydra_PIX_Consumer|NIST|20130810082517||ACK^K23^RSP_K23|IHE PIX Manager-20130810082517-1|P|2.5||||||UNICODE UTF-8
MSA|AE|NIST-20130810082516
ERR|||204^UnknownKeyIdentifier^^^Patient Id is not exist|E
QAK|QRY12434188486468|AE
QPD|Q23^IHE PIX Query|QRY12434188486468|HC-352^^^NIST2010&2.16.840.1.113883.3.72.5.9.1&ISO|^^^NIST2010-2&2.16.840.1.113883.3.72.5.9.2&ISO
MSA|AE|NIST-20130810082516
ERR|||204^UnknownKeyIdentifier^^^Patient Id is not exist|E
QAK|QRY12434188486468|AE
QPD|Q23^IHE PIX Query|QRY12434188486468|HC-352^^^NIST2010&2.16.840.1.113883.3.72.5.9.1&ISO|^^^NIST2010-2&2.16.840.1.113883.3.72.5.9.2&ISO