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Endotracheal Tube, Cuffed

Irrigation Syringes

Irrigation Syringes

Description
  • Bulb type, ring type, flat type available.
  • Wide and thick folded barrel ear, comfortable to hold, resistant to distortion. irrigating the wound from infection.
  • Capacity: 60ml.
  • PE or blister pack.
Ref. No.: Type: Qty.Cs:
NMH000203 Bulb 50 PCS / CTN
NMH000202 Ring 50 PCS / CTN
NMH000201 Flat 50 PCS / CTN
Irrigating Syringe, Today I’m going to talk about the effect of needle insertion depth on irrigant flow in the root canal. Irrigating Syringe

Irrigating Syringe

There have been countless articles published over decades describing the exchange of irrigants based on how deep the needle is inside a shaped root canal. In fact, there are a lot of controversies and so we have to step back just a little bit so we can better appreciate irrigant exchange. First of all, irrigants have been dispensed through typically large diameter stainless steel needles. In recent years, we’ve been able to use nickel titanium cannula which is much more flexible and we’ve been able to use gauges anywhere from 29, 30, and 31. In a well-shaped canal, this type of gauged needle will easily work itself through curvatures and into the apical one-third of a well-shaped canal. The thing I want to talk about is typically, probably, controversial because there’s misinformation and, because there’s such a diversity of opinions, we have different speakers and journal articles and textbooks all reporting things that are quite confusing. Let me explain. It has been reported repeatedly that we can only really irrigate about 1-2 mm apical to the level of the needle in the canal. I’d like you to think about this and ask yourself, "Is that true?" Because if you assume that that’s true, then lots of things will happen procedurally based on those belief systems. The side bent needles need to be discussed, just briefly. There are a lot of different canula and gauges as I have mentioned. There are different thoughts regarding – Do you have side port delivery, Irrigating Syringe or do you have a flat 90° angle to the long axis of the cannula in the irrigator? Or, do you side irrigate? Most people have traditionally used a beveled needle and irrigated through the very terminal end of the cannula; however, because of the concern with sodium hypochlorite accidents, manufacturers have produced side port irrigation devices, presumably so that you can’t irrigate through the apical end, the most distal extent of the cannula, but rather the irrigant has to move laterally. Well, pretty much if you want to exchange irrigant in a well-shaped canal, you do not want lateral, side port delivery. This is very, very ineffective. Although you could argue that it would reduce the potential for sodium hypochlorite accidents. So now I have to digress further and say that we can pretty much eliminate sodium hypochlorite accidents if we simply do two things. One, keep your hand moving as you progressively dispense reagent into the shaped canal. If the hand is moving, the needle then can never be locked up inside a shaped canal where the canal becomes an extension of the canula. This will clearly invite or promote driving reagent through the foramen and this can cause quite an upset, such as the reported sodium hypochlorite accident. The other thing to be aware of when you’re irrigating is – move the plunger slow. Slow plunger speed equates to a very sustained gentle type of irrigation where we’re not trying to hydraulically drive irrigant deeper than the canula. So, keep your hand moving and dispense the reagent in a slow rate... that means mLs per seconds of time. Your office can figure out what’s appropriate for you. So, back to our question – How deep do we deliver reagent apical to the canula? You can begin to see it’s based on the shape of the canal; it’s based on the gauge of the canula itself. It has to do further – Is it side port or is it end delivery? What I want to say is – the articles are largely talking about ‘end delivery’. They’re largely talking about shapes that are quite large apically so that you can get the canula deep into the canal. But, let’s just cut to the chase. The articles will say that you can only effectively exchange irrigant 1 or 2mm apical to the level of the canula in the shaped canal. I totally disagree with this, but yet article, after article, after article continues to make these assertions. Here’s what I would like you to do: The way they conducted their methodology would explain their results. So, in other words, their results are honest, their results are accurate and there are big limitations based on how they irrigate. What they are basically doing is pressing on the plunger and moving reagent through a cannula and they’re looking at different fluid dynamic models to assess fluid movement. In most instances, Irrigating Syringe these magazines will report that a side bent needle can achieve replacement to working length only if the needle is 1mm short of the full working length. Whereas they’ll say an open-ended needle that’s flat on the end, it can be a little further back at the 2mm level and still you’ll see fluid exchanged in that apical 2mm.