This is possibly the easiest tool to use. You can't get any misses with it, and there's not a whole lot to it. However, I will say this: when using the gel, make sure to be constantly pressing the button consecutively. You need to do this because if you simply hold it down, the gel will only spread a little bit and then stop completely.
When gelling the incision area before the lobectomy, a single pass with the gel is enough. Just make sure you don't do it TOO fast or you might not get it on all the dots. When gelling the incision area before applying the bandage, you need to gel throughout the entire line and make several passes. This one you can do quickly, just make sure you do many passes with the gel until you get the OK.
The syringe might not seem all that complicated, but it is actually one of the hardest tools to use. Possibly the hardest one. The reason is that, when injecting something that isn't stabilizer, if you miss the spot where you're supposed to inject by a little bit, you will get a miss. This single-handedly destroys your chance of getting the XS in an operation no matter what you have done up to this point, so as you can see, it is a very dangerous tool that should be used with care.
When injecting stabilizer you don't have to worry about getting misses. Generally speaking it doesn't matter where you inject it. Oftentimes you'll want to inject repeatedly as fast as you can. In my experience it seems that the more you fill up the syringe before injecting, the better. This isn't so easy to do, however, since you generally want to inject so fast that you might tend to jump the gun a bit and not fill it up completely every now and then. Don't worry so much though. In the grand scheme of things it isn't all that important if you fill your syringe completely or 3/4s of the way sometimes.
There is a trick that you can do when using the syringe, which I call warping. When filling the syringe or injecting with it, you may notice that, as long as you have the button pressed, and as long as the syringe hasn't finished filling up/emptying out, you can move the wiimote as much as you want and the cursor won't move. But as soon as the syringe is done filling/emptying, the cursor will appear where you are currently pointing the remote. Using this trick, you can save some time. For example, when treating inflammations, you can move the remote over to the anti-inflammatory bottle while the syringe is injecting, and when it's done you can immediately fill it up again. It works the same the other way. While it's filling up you can move over to an inflammation and inject it immediately.
When dealing with inflammations and injecting other things that aren't stabilizer my recommendation is to be very careful so as to avoid a miss. When doing this, your first instinct might be to concentrate on what you're trying to inject, but in my experience, it's actually better to concentrate your gaze on the wiimote's cursor, and relegate the object you're trying to inject to your peripheral vision. I find that this makes it easier to make sure that the cursor is over the object before pressing the button.
The sutures aren't that hard to use, and they won't get you a miss if you fail other than when you're closing up a patient. However, if you get a BAD your chain will break, which is undesirable. The interesting thing about the sutures is that the motions required to get a COOL vary depending on the wound or opening. There tends to be little way to know exactly what the game will accept as a COOL for a particular wound until you try. Generally speaking though, when dealing with lacerations a good rule is to make many passes. For small ones 4-5 passes tends to be enough, for long ones, double that amount. For huge ones around 15.
It's important that you learn to suture very quickly. The easiest lacerations to take care of are the ones that are more or less vertical. Do it by snapping your wrist left to right as you move your arm top to bottom. The ones that are horizontal are harder since snapping your wrist up and down doesn't feel quite as natural as to the sides. Generally speaking I tend to do these lacerations a little bit slower since I have to actually move my arm both up and down and to the side.
Ok I lied. The antibiotic gel isn't the easiest tool to use. It's probably this one. To use the drain just place it over something and hold down the button. Easy. There's not a whole lot to it. Though I will say to remember that it has an area of effect. Oftentimes if there are two things you need to drain and they are near each other, it's more effective to place the drain between them. They will both be drained at the same time. This way you can drain things twice as fast. Also remember to keep it steady when draining something that takes a while.
The problem with the blue laser is that 1) it tends to wear out quickly and 2) it can damage organ tissue. Therefore, it's usually a good idea to use it moderately. Most things you use the laser on can be burned with just a momentary prick, so there's rarely a need to keep it activated for a long time. Also, remember that, like the drain, it also has an area of effect. If there are two things near each other, you can laser between them and they'll both get burned.
The red laser which you use when fighting Pempti works exactly the same as the blue one except it never wears out, so unlike the other one you should keep this one activated 24/7.
This is another tool with not much to it. When trying to locate moving bodies it's a good idea to spam it near the center of the organ. When trying to find stationary bodies it's also a good idea to start near the center and slowly widen your searching area as you go. Remember that sometimes you might momentarily pick up something with the fringes of the ultrasound but it might disappear and you'll have to scan it again with the center of the tool.
The magnification tool is used in a few operations near the start of the game and then is promptly forgotten. The only advice I will give here is to remember that it sits in the same position as the ultrasound and that you need to press A to activate it. B will not work.
The scalpel reduces vitals at around the same rate that the gel raises them. There's not really much I can tell you about using this tool. It's pretty straightforward. I will say that when you're cutting along a dotted line, it's usually better to make the motion relatively slow so that you're more precise rather than to rush and miss some dots and having to go back.
The forceps are almost the sole reason why I made this section. My recommendation when using these guys is to realize that you are not actually using a real forceps. It is NOT necessary to press both A and B at the same time to grab something and let go of them to place it somewhere.
Instead, when using the forceps, ALWAYS have the A button pressed. Put your thumb on top of it and grip the wiimote firmly with it. When grabbing something, simply press the B button (the A button should already be pressed, and indeed, should be at all time), and when placing something simply let go of the B button. Not both buttons.
This little trick works well and gives you much, much greater control and precision with the forceps.
The Healing Touch is a bit of a strange beast in this game. Mainly because it's not very well implemented compared to the Healing Touch in, say, New Blood. Truth is, you NEVER need it. The only operations in which you're forced to activate the Healing Touch are Striving For Asclepius and the Savato battle.
You will never see me use the Healing Touch in any of my videos when it's not necessary. In fact, I will rarely even acknowledge its existence. None of my strategies depend on it. If you want to use it, that's up to you.
If you want my advice on learning to draw a star and the video demonstration, go to operation 2.3 - Striving For Asclepius.