CRISIS IN THE PERSIAN GULF : Freed Hostage’s Wife Says He ‘Suffered a Lot’ : Captivity: It wasn’t their first crisis<i> .</i> She recalls their escape from South Vietnam in 1975.

The wife of released American hostage Randall Trinh said Sunday that he suffered “a lot of stress and fear” while being held as a so-called human shield in an Iraqi military factory but that his peptic ulcer is improving now.

“In Iraq, he was with a lot of stress and fear and anguish. The stomach is still bothering him, but with the prospect of seeing his family again, he felt great,” said Kim Yen Trinh, who has spoken with her husband twice by telephone since he was released Saturday from Iraq along with three other ailing Americans.

Trinh’s captivity was hardly the family’s first crisis situation, she said, speaking from an apartment she shares with a daughter in Fullerton.

The Trinhs left South Vietnam on a barge the day before the fall of Saigon in 1975 and were towed out to sea by a tugboat before they were picked up by an American warship, she said.

They became U.S. citizens in 1982. Randall Trinh, a structural engineer, went to Kuwait five years ago to work for Santa Fe International Corp., a drilling and construction firm owned by Kuwait Petroleum Corp. His wife joined him two years ago. She was in Paris, on her way back to Kuwait from a visit to the United States, when the Iraqis invaded Kuwait on Aug. 2.

After the invasion, Randall Trinh hid out in the couple’s apartment in Kuwait city, initially telling Iraqi soldiers who searched the building that he was a Vietnamese citizen who had lost his passport, she said.

Later, when American diplomats relayed an Iraqi promise of safe passage, he traveled to Baghdad along with other foreigners hoping to fly out of Iraq. But he was trapped when the Iraqis declared that American men would not be allowed to leave, his wife said.

At first, Trinh was held with other foreigners at a luxury hotel, she said. But early last week he was moved to a factory as part of Iraq’s policy of keeping some foreigners at strategic sites to discourage attack by Western forces massed in Saudi Arabia.

“Five days prior to release, he was taken to the installation, and it was frightening,” she said.

There, she said, his ulcer flared up and he suffered acute pain before being transferred to a hospital. The intervention of a delegation from the Fellowship of Reconciliation, a New York-based pacifist group, helped free him and the three other Americans. “I feel grateful, and I feel lucky and happy,” she said. Trinh, who flew from Baghdad to Amman, Jordan, is due to arrive today at Los Angeles International Airport via Cyprus, London and New York.