The court has reviewed the record, the briefs of the parties, and the order of the district court. We find no error in the handling of this matter and affirm the district court’s Order Denying Respondent’s Request for Release from Confinement, entered April 5,1984. The district court may, of course, periodically review the appellant’s confinement to determine whether it has lost its coercive effect and become punitive. We note that such a determination is a matter placed within the sound discretion of the district judge, and review before us is very limited. Simkin v. United States, 715 F.2d 34 (2d Cir. 1983).

AFFIRMED.