An Evaluation of Navina Mini, a New Trans-anal Irrigation (TAI) Device in Children and Adolescents

Inclusion Criteria: * Signed informed consent * Male and female children/adolescents between 3 and 17 years of age at the time of inclusion * Diagnosis of at least one of the following: * functional constipation not well treated with oral laxatives * functional fecal incontinence, either retentive or non-retentive (FNRFI: Functional Non-Retentive Fecal Incontinence) not well treated with oral laxatives * neurogenic bowel dysfunction due to spinal abnormalities and/or spinal cord injury or cerebral palsy * patient with sequelae of anorectal malformations to Hirschsprung disease * Fecal Incontinence (FI) due to iatrogenic injury including tumor surgery sequelae * Symptom duration of \> 3 months * Subject and/or their legally designated representative can communicate in written and oral Swedish language Exclusion Criteria: * Children/adolescents previously treated with, or currently in need of, high volume TAI, i.e., volume \> 250 ml * Confirmed pregnancy at the time of enrollment * Participating in another clinical investigation interfering with this investigation * Subjects with an active, symptomatic, inflammatory bowel disease, radiation proctitis, and or active perianal fistula disease * Rectal bleeding of uncertain origin or active hemorrhoidal bleeding * \< 6 months after anal or colorectal surgery * Ongoing anti-coagulant therapy (i.e., NOACS, heparin, warfarin) * Ischemic colitis * Active anal fissure * Inability to use the product or anyone to assist in its usage (hand function assessment) * Person not suitable for the investigation according to the investigator's judgment