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Neurovascular Training > Coiling > Flashcards

Coiling Flashcards

1
Q

Primary Wire Filament or Filar

A

The actual wire from which a coil implant is made

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2
Q

Primary Wind

A

The first wind of the filar made around a mandrel; forming it into a coil or “slinky” shape

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3
Q

Secondary Wind

A

Second wind of the primary wind which gives the coil its specific shape or configuration

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4
Q

Stretch-Resistant (SR) Element

A

Present on many coils; located within the primary wind
~connected to distal and proximal ends
~prevents coil from stretching

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5
Q

3 types of coil shapes/configurations

A
  • 3D
  • Complex
  • Helical (stacks up like coins)
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6
Q

Calculating the percent of packing volume after a coil embolization can be used as an indicator of:

A

long term success and depends on an accurate calculation of aneurysm volume

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7
Q

Steps to calculate how many coils to put in an aneurysm

A 
1) Calculate volume of the aneurysm
~Height x Width
2)Volume of cylinder/total length of coils deployed
~ (Pi(OD^2)(Length) / 4 )
3)Calculate percent packing volume
~ (Vol of Coils / Vol of Aneurysm) x 100
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8
Q

What has more impact to coil volume: outer diameter or length of coil?

A

Outer Diameter

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9
Q

4 REASONS why coil softness is important:

A

1) conformability
2) durability
3) packability
4) deliverability

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10
Q

4 FACTORS that contribute to coil implant softness:

A

1) primary wire
2) primary O.D.
3) stretch-resistant element
4) pitch

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11
Q

Stiffness/Softness Measure:

A

k

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12
Q

If primary wire (Dw) INCREASES; implant is ____

A

stiffer

~& vice versa

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13
Q

If O.D. INCREASES, implant is _______

A

softer

~& vice versa

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14
Q

Closed Loop Coils =

A

STIFFER/more structure

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15
Q

Open-Loop Coils =

A

SOFTER! no real shape

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16
Q

Axium & Axium Prime indications:

A
  • Endovascular embolization of intracranial aneurysms
    -Embolization of other neurovascular abnormalities (AVMs, AVFs)
    ~Axium Prime (Frame) : arterial and venous embolizations in peripheral vasculature
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17
Q

AXIUM QC Detachable Coil features & benefits

A

Large loop diameter - sphere diameter ratio & random loop design

benefits:
~enhanced conformability
~deflects into aneurysm space more easily

**CONFORMABLE **UTILITY

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18
Q

Axium QC detachable coil good for:

A

~irregular shaped aneurysms

~stent-assisted coiling

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19
Q

Axium QC Coil Types:

A

Hx: 1.5-20
3D: 2-25

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20
Q

Axium QC Secondary Loop Sizes (mm)

A
  • 1.5-3.5
  • 4-6
  • 7-10
  • 12-25
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21
Q

Axium QC Primary Wire Sizes (in)

A
  • .0015
  • .0020
  • .00225
  • .00275
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22
Q

Axium QC Coil Primary O.D (in)

A
  • .0115/11.5
  • .0125/12.5
  • .0135/13.5
  • .0145/14.5
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23
Q

MicroFx microfilaments materials

A
  • PGLA: absorbable suture

- Nylon: permanent; resistance to blood flow

24
Q

MicroFx ________ Technology

A

LatticeFX

~overlapping microfilaments

25
Q

Axium MicroFX Detachable Coil:

Each filament is:

A
  • .0009” in diameter
  • 2mm in length
  • 2mm in spacing
26
Q

Axium MicroFx Detachable Coil:

True/False: The first loop is free of microfilaments

A

True- to maintain first loop performance

27
Q

Axium MicroFX Coil:

True/False the outer diameter remains the same as the coil gets bigger

A

False- OD gets bigger as coil gets bigger

28
Q

MicroFX Coil Types:

A 
*PGLA 3D 
~2-18
*PGLA Hx
~2-10
*Nylon Hx
~2-4
29
Q

MicroFx PGLA 3D Secondary Loop Sizes (mm)

A
  • 2-3
  • 4-6
  • 7-10
  • 12-18
30
Q

MicroFx PGLA Hx Secondary Loop Sizes (mm)

A
  • 2-3
  • 4-6
  • 7-10
31
Q

MicroFx Nylon Hx Secondary Loop Size (mm)

A
  • 2-3

* 4

32
Q

MicroFx PGLA 3D Primary Wire Size (in)

A
  • .0015
  • .0020
  • .00225
  • .00275
33
Q

MicroFx PGLA Hx Primary Wire Size (in)

A
  • .0015
  • .0020
  • .00225
34
Q

MicroFX Nylon Hx Primary Wire Size (in)

A
  • .0015

* .0020

35
Q

MicroFx PGLA 3D Primary O.D Size (in)

A
  • .0115/11.5
  • .0125/12.5
  • .0135/13.5
  • .0145/14.5
36
Q

MicroFx PGLA Hx Primary O.D (in)

A
  • .0115/11.5
  • .0125/12.5
  • .0135/13.5
37
Q

MicroFx Nylon Hx Primary O.D. Sizing

A
  • .0115/11.5

* .0125/12.5

38
Q

3 features of Axium Prime FRAME

2 of 3 now a feature of every coil

A

1) PRIME FRAME ONLY: hybrid implant design
2) smooth coil delivery
3) reliable detachment

39
Q

Elements of smooth coil delivery

A
  • Ball & socket design allows for 360 degree axial rotation
  • Beveled socket = increased articulation
  • tapered pusher = enhanced trackability

~67% increase in angular flexibility

40
Q

Elements of reliable detachment

A
  • instant MECHANICAL detachment
  • 99.7% proven reliability *******
  • back-up detachment method: manual option
41
Q

Prime FC Coil Types

A

3-25 (3D)

42
Q

Axium Prime Frame Features

A
  • Open Loop Configuration
  • Complete proximal and distal anchor loops
  • Uniform loop distribution and dense neck coverage
43
Q

Axium Prime Soft (different features)

A

44% thinner .0015” primary wire
38% thinner .0011” stretch-resistant strands
*4x softer implant

44
Q

Axium Prime SS (Hx & 3D) Secondary Loop Size (mm)

A

4-6

45
Q

Axium Prime SS Coil Primary Wire Size (in)

A

.0015

46
Q

Axium Prime Soft O.D Size (in)

A

.0115/11.5

47
Q

Axium Prime Extra Soft (differentiating characteristics)

A

-Softness enhanced by thinner .0013” primary wire & larger .0108” primary OD

48
Q

Coil Abbreviations:
FC=
SS=
ES=

A 
FC= Framing Coil
SS= Super Soft Coil
ES= Extra Soft
49
Q

Axium Prime ES Coil Types

A
  • 1-3 (Hx)

* 1-3.5 (3D)

50
Q

Axium Prime Extra Soft Secondary Loop Size (mm)

A

1-3.5

51
Q

Axium Prime Extra Soft Primary Wire Size (in)

A

.0013”

52
Q

Axium Prime Extra Soft Primary O.D.(in)

A

.0108/10.8

53
Q

Axium Coils: softness Stability

A

ES –> Soft –> Frame –> MicroFx

54
Q

4 components of a coil system:

A

1) Coil Implant
2) Detachment Zone
3) Pusher Wire (Coil alignment marker & exit marker)
4) Detachment Handle

55
Q

3 coil types:

A

1) Frame (Basket)
2) Fill (2-4mms)
~dense packing
3) Finishing (2mm)
~soft, small coils–typically placed at neck of aneurysm; super soft and small

56
Q

A technique where as the coiling progresses, the diameter and length that are chosen get smaller and smaller
~coils typically become softer and softer

A

Russian Doll Technique

Neurovascular Training (4 decks)

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