Length of peritoneal end of shunt catheters in hydrocephalus in children and rate of complications

Gupta, Mahesh; Digra, Naseeb C; Sharma, Narendra Shriram; Goyal, Subhash; Agrawal, Amit

doi:10.4103/2278-9588.102468

Cited by 4 publications

(1 citation statement)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The process of extraction or unpacking of an object which has an effective one-dimensional topology is very common in nature, including the DNA molecule that is ejected from virus capsids [1] and the extraction of catheters in surgical interventions [2,3] up to the unwinding of wires in industry, and the unpacking of polymers and long-chain biomolecules in drug delivery [4][5][6][7][8][9][10][11][12]. The initial conformation of such one-dimensional objects confined in a finite volume present some analogies with the patterns found in the packing or in the crumpling of a long piece of wire [13,14].…”

Section: Introductionmentioning

confidence: 99%

Unpacking of a Crumpled Wire from Two-Dimensional Cavities

et al. 2015

View full text Add to dashboard Cite

The physics of tightly packed structures of a wire and other threadlike materials confined in cavities has been explored in recent years in connection with crumpled systems and a number of topics ranging from applications to DNA packing in viral capsids and surgical interventions with catheter to analogies with the electron gas at finite temperature and with theories of two-dimensional quantum gravity. When a long piece of wire is injected into two-dimensional cavities, it bends and originates in the jammed limit a series of closed structures that we call loops. In this work we study the extraction of a crumpled tightly packed wire from a circular cavity aiming to remove loops individually. The size of each removed loop, the maximum value of the force needed to unpack each loop, and the total length of the extracted wire were measured and related to an exponential growth and a mean field model consistent with the literature of crumpled wires. Scaling laws for this process are reported and the relationship between the processes of packing and unpacking of wire is commented upon.

show abstract