Expanding over subdivision in depth of the clefts for every classification is not necessary because the principles of treatment and technique for correction are the same.There are four categories:

simple constriction rings
constriction rings associated with deformity of the distal part with or without lymphedema
constriction rings associated with acrosyndactyly
uterine amputationPatterson divided the constriction ring associated with acrosyndactyly into three types:

Type I: conjoined fingertips with well-formed webs of the proper depth
Type II: the tips of the digits are joined, but web formation is not complete
Type III: joined tips, sinus tracts between digits and absent websPatterson IThere are simple constriction rings which are strands most commonly around the distal extremities as fingers and toes. In general, the thumb is not likely to be affected by a constriction ring because the fetus typically holds the thumb in tight adduction flexion, making entanglement with strands less likely. These malformations need to be surgically removed which must be executed in different stages and can done by different techniques (see also treatment). Patterson IIThe CRS involves strands which obstruct the lymphatic vessels and thus causing fluid retention, distal of the affected extremity. This utters itself with swollen parts distal of the constriction. Patterson IIIIn this form there is a complex form of syndactyly named acrosyndactyly, the fingers (or toes) were initially separated but due to the constriction they are formed back together. Sometimes multiple fingers can be involved. The distal fusion between digits or toes never initially involves a skeletal coalition. The digits are usually hypoplastic if multiple digits are involved.
This will avoid any problems to the distal circulation in the limb, which may already be compromised. Lymphedema, when present, will significantly improve within a few weeks of the first surgery. "For the direct closure of the defect after dissecting a constriction band there are two techniques:

Triangular flaps; For this technique the circumference between the two borders must be measured. Depending on the difference the number of triangular flaps can be decided. With a triangular flap you can create more skin. Z-plasty or W-plasty; "Z-plasty is a plastic surgery technique that is used to improve the functional and cosmetic appearance of scars. It can elongate a contracted scar or rotate the scar tension line. The middle line of the Z-shaped incision (the central element) is made along the line of greatest tension or contraction, and triangular flaps are raised on opposite sides of the two ends and then transposed. "In rare cases, if diagnosed in utero, fetal surgery may be considered to save a limb that is in danger of amputation or other deformity. This operation has been successfully performed on fetuses as young as 22 weeks. The Melbournes Monash Medical Centre in Australia, as well as multiple facilities in the United States of America, have performed successful amniotic band release surgery. Reconstructions and prosthetics
Treatment usually occurs after birth and where plastic and reconstructive surgery is considered to treat the resulting deformity. Plastic surgery ranges from simple to complex depending on the extent of the deformity.